Urethane On Wood - Hot Rod Forum : Hotrodders Bulletin Board
Hotrodders.com -- Hot Rod Forum



Register FAQ Search Today's Posts Unanswered Posts Auto Escrow Insurance Auto Loans
Hot Rod Forum : Hotrodders Bulletin Board > Tech Help> Body - Exterior
User Name
Password
lost password?   |   register now

Reply
 
LinkBack Thread Tools
  #1 (permalink)  
Old 01-07-2005, 08:41 AM
jcclark's Avatar
The Penny Pincher
 

Last journal entry: Hanging Bumpers
Last photo:
Join Date: Dec 2004
Location: Louisville, Ky. U.S.A.
Age: 61
Posts: 1,887
Wiki Edits: 0

Thanks: 4
Thanked 23 Times in 19 Posts
Urethane On Wood

I have always sprayed furniture lacquer on cabinets
and heve read lately on other forums that some guys
are spraying auto clear urethane on wood.
Does anybody know about this? Can I use my "car" clear
on wood? I have a lacquer sealer I put on first then scuff
before topcoating. Would this be a acceptable base
for the clear? My stain is an oil base so I don't think
I would try the clear over just that.
Any input is greatly appreciated.

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 01-07-2005, 08:45 AM
willys36@aol.com's Avatar
Hotrodders.com Moderator
 
Last wiki edit: How to rebuild a Rochester Quadrajet 4MV carbureto...
Last journal entry: How to change auto shift timing on 200R4
Last photo:
Join Date: May 2002
Location: Bakersfield
Posts: 8,393
Wiki Edits: 21

Thanks: 1
Thanked 10 Times in 8 Posts
This topic was just discussed in a thread within the past week. In answer to your question, in general, yes, urethane clear goes over wood well. Specifically, I suggest you try your formula on some test pieces to see if all the products are compatible.
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 01-07-2005, 10:27 AM
Bluepen's Avatar
Just a firefighter
 
Last wiki edit: How to title a hot rod
Last journal entry: New rear rollpan installed
Last photo:
Join Date: Jan 2003
Location: Copperas Cove, Texas
Age: 57
Posts: 324
Wiki Edits: 2

Thanks: 0
Thanked 1 Time in 1 Post
In '03 on one of the Hot Rod shows on TV, I think it was Street Rodder or something, they had a Street Rod of the year contest and they had a custom woodie on it and they used clearcoat on the outside exposed wood and it looked real good.
I know I'm planning on making running boards for my '46 Chevy Panel from Oak but not sure of the finish yet, I was thinking of some kind of a marine finish might be better.

David
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 01-07-2005, 11:39 AM
jcclark's Avatar
The Penny Pincher
 

Last journal entry: Hanging Bumpers
Last photo:
Join Date: Dec 2004
Location: Louisville, Ky. U.S.A.
Age: 61
Posts: 1,887
Wiki Edits: 0

Thanks: 4
Thanked 23 Times in 19 Posts
Willys

I also thought about making the samples but unlike cars,
furniture is built for a lifetime and I'm not convinced that
good adhesion for the next year or two means good for
the next 50 or 75 yrs. My furniture will last longer than that.
I did spray car lacquer once and it peeled off like a plastic
sheet. Apparently furniture lacquer has something in it
different that lets it stick to wood that has been stained.
I don't think "unstained" wood would be a problem .
I guess my question is would "stained wood" with furniture lacquer sealer,or furniture lacquer (topcoat) be a compatible base for urethane? I've heard some urethanes can go over lacquer,
But they were talking about automotive lacquer, and that's
different. I may need a company tech rep for this one.
But thanks for yours and everyones input.
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 01-07-2005, 11:51 AM
willys36@aol.com's Avatar
Hotrodders.com Moderator
 
Last wiki edit: How to rebuild a Rochester Quadrajet 4MV carbureto...
Last journal entry: How to change auto shift timing on 200R4
Last photo:
Join Date: May 2002
Location: Bakersfield
Posts: 8,393
Wiki Edits: 21

Thanks: 1
Thanked 10 Times in 8 Posts
My guess is that your only concern will be infant mortality; if it cures over your sub-coats and still looks good and is still stuck after a week or so, it should last forever.
Reply With Quote Quick reply to this message
  #6 (permalink)  
Old 01-07-2005, 12:34 PM
daimon1054's Avatar
Member
 
Join Date: Oct 2003
Location: Louisiana
Posts: 496
Wiki Edits: 0

Thanks: 0
Thanked 1 Time in 1 Post
Would you want to add a flex agent? Wood expands and contracts and I would worry about it cracking or hazing. I know it will go on and stick but how long will it look good? Wood working urethane is flexable to some extent.
Reply With Quote Quick reply to this message
  #7 (permalink)  
Old 01-07-2005, 01:11 PM
Member
 
Last photo:
Join Date: Jan 2003
Location: tennessee
Posts: 5,915
Wiki Edits: 0

Thanks: 0
Thanked 7 Times in 7 Posts
For what it is worth, I use Nason clear coat on walnut gun stocks and have never had any problems. My Marlin deer rifle has been wet a number of times and so far it is holding up just fine. Also years ago I used auto lacquer on UNstained walnut wood with no problems.
Reply With Quote Quick reply to this message
  #8 (permalink)  
Old 01-10-2005, 07:13 PM
antiquecar's Avatar
old car nut
 
Last photo:
Join Date: Jan 2005
Location: northern ky
Age: 69
Posts: 108
Wiki Edits: 0

Thanks: 0
Thanked 2 Times in 2 Posts
I am sure that most people are talking about a clear coat but i last year painted the roof on my 23 Dodge Screenside with a catalysed primer and imron. The room has both metal brackets and a wood frame. I have had no problem so far
Reply With Quote Quick reply to this message
  #9 (permalink)  
Old 01-10-2005, 08:15 PM
Member
 
Last photo:
Join Date: Apr 2004
Location: Georgia
Posts: 3,578
Wiki Edits: 0

Thanks: 10
Thanked 61 Times in 39 Posts
Re: Willys

Quote:
Originally posted by jcclark
I also thought about making the samples but unlike cars,
furniture is built for a lifetime and I'm not convinced that
good adhesion for the next year or two means good for
the next 50 or 75 yrs. My furniture will last longer than that.
I did spray car lacquer once and it peeled off like a plastic
sheet. Apparently furniture lacquer has something in it
different that lets it stick to wood that has been stained.
I don't think "unstained" wood would be a problem .
I guess my question is would "stained wood" with furniture lacquer sealer,or furniture lacquer (topcoat) be a compatible base for urethane? I've heard some urethanes can go over lacquer,
But they were talking about automotive lacquer, and that's
different. I may need a company tech rep for this one.
But thanks for yours and everyones input.
*******************************************
As carefully as I can!
Sorry there is no difference between lacquer for furniture or for car, "except for price" Because the distributor selling that furniture lacquer is not going to tell you who is making it for them and their label.
Furniture does not have to worry about parking lot dings, UV's, or 25 cent car washes blowing the clear off, so even urethane over lacquer is not an issue for long term as it would be on a car.
The furniture industry as a whole is where the auto painters were in 1985-89 slowly moving to waterborne and urethanes and some UV coatings.
Reply With Quote Quick reply to this message
  #10 (permalink)  
Old 01-11-2005, 12:06 AM
New Member
 
Join Date: Dec 2004
Location: Tennessee
Age: 50
Posts: 23
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
One thing you need to consider is moisture getting between the wood and the clear and causing it to peel.

My dad and I sprayed the wood in the bed of my '36 with clear Imron the first time we built it and it looked great for a couple of years, then we started to notice cloudy patches that turned into bubbles and eventually the clear started peeling off in places. It's been a long time and I've killed off a lot of brain cells since then, but I want to think it was only 4 or 5 years before we started seeing the clear peel. I've seen other trucks with similar problems whether they used urethane, lacqure, or whatever. My truck was droven almost daily and even though it was kept in a garage it was exposed to a lot of weather so if you are building a show vehicle that will be treated easier you'll probably have better results than I did.

My father-in-law (who builds and refinishes furniture as a hobby) suggested that we either had parts of the wood that were left exposed (such as the ends of the boards or the bolt holes) or the finish got scratched and the wood was able to absorb moisture (from rain, car washes, or just humidity in the air). Then when the sun hit it and the moisture started to evaporate it bubbled up under the finish as it tried to escape into the atmosphere. I don't know if this is right or not, but it sounds better than anything I can come up with so this time around I am going to take care to get a good even finish on every part of the wood before I install it. Either that or I'll just go with an oil finish which will look great but be a lot more work to keep looking good..
Reply With Quote Quick reply to this message
  #11 (permalink)  
Old 01-11-2005, 12:16 AM
willys36@aol.com's Avatar
Hotrodders.com Moderator
 
Last wiki edit: How to rebuild a Rochester Quadrajet 4MV carbureto...
Last journal entry: How to change auto shift timing on 200R4
Last photo:
Join Date: May 2002
Location: Bakersfield
Posts: 8,393
Wiki Edits: 21

Thanks: 1
Thanked 10 Times in 8 Posts
Good point. I wouldn't clear coat any wood that is exposed to moisture. Almost impossible to keep from peeling like you described.
Reply With Quote Quick reply to this message
  #12 (permalink)  
Old 01-11-2005, 10:13 AM
jcclark's Avatar
The Penny Pincher
 

Last journal entry: Hanging Bumpers
Last photo:
Join Date: Dec 2004
Location: Louisville, Ky. U.S.A.
Age: 61
Posts: 1,887
Wiki Edits: 0

Thanks: 4
Thanked 23 Times in 19 Posts
As I said before, there is a difference between auto lacquer and
furniture lacquer, it even smells different. The auto lacquer
just doesn't stick to wood that has an oil base stain, I can peel
it off in large sheets. Won't try that again.
I don't know what's different but believe me from my experience
it's different.
Reply With Quote Quick reply to this message
  #13 (permalink)  
Old 01-11-2005, 10:26 AM
New Member
 
Join Date: Dec 2004
Location: Tennessee
Age: 50
Posts: 23
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
In the case of my 36, my sister's 34, and quite a few other trucks I know of, the beds were coated with lacquer or urethane over bare wood, not stained wood. I've described te results above. The beds were made of different typws of wood, mine was sassafras, my sisters was walnut, one friends was cedar, one was cherry, one was chestnut lumber from an old barn, and the rest were oak.

It stands to reason that any automotive clear would not adhere well to an oil based product, but in our cases the automotive finishes failed on bare wood.

The more I think about it the more I believe that the only way to get a durable and long lasting finish is to have a finishe that penetrates in the wood yet still allows it to breathe, like linseed oil, tung oil, etc. I'm definitely going to have to look into this much more before I finish my truck this time.
Reply With Quote Quick reply to this message
  #14 (permalink)  
Old 01-11-2005, 04:57 PM
pmeisel's Avatar
Glad the Jeep is on the road
 
Last wiki edit: How to identify a Ford V8
Join Date: Jan 2004
Location: Meridian MS & Vermilion Ohio
Age: 58
Posts: 814
Wiki Edits: 8

Thanks: 0
Thanked 1 Time in 1 Post
Another Way - www.westsystem.com

The real hot shot marine guys 'round here (I'm not one of them, I just have talented friends) use West System Epoxy -- one of their products is designed for clear coating. (207 Hardener).

Read the literature to confirm for your application, but if you can use it on a boat the moisture and UV a car sees shouldn't be a problem. For constant exposure to UV it may need varnish on top of it. But -- properly applied this stuff is impervious to moisture.
Reply With Quote Quick reply to this message
  #15 (permalink)  
Old 01-11-2005, 05:56 PM
willys36@aol.com's Avatar
Hotrodders.com Moderator
 
Last wiki edit: How to rebuild a Rochester Quadrajet 4MV carbureto...
Last journal entry: How to change auto shift timing on 200R4
Last photo:
Join Date: May 2002
Location: Bakersfield
Posts: 8,393
Wiki Edits: 21

Thanks: 1
Thanked 10 Times in 8 Posts
Re: Another Way - www.westsystem.com

Quote:
Originally posted by pmeisel
The real hot shot marine guys 'round here (I'm not one of them, I just have talented friends) use West System Epoxy -- one of their products is designed for clear coating. (207 Hardener).

Read the literature to confirm for your application, but if you can use it on a boat the moisture and UV a car sees shouldn't be a problem. For constant exposure to UV it may need varnish on top of it. But -- properly applied this stuff is impervious to moisture.
Problem comes from moisture from the bottom of the planks, scratches, etc. Marine guys coat their wood with fiberglas cloth inside and out, then clear epoxy and/or marine varnish. Still, if not continuously maintained, water gets into the wood and starts to separate the top coating. Best finish for a truck that isn't a trailer queen is a penetrating oil.
Reply With Quote Quick reply to this message

Recent Body - Exterior posts with photos

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Hot Rod Forum : Hotrodders Bulletin Board forums, you must first register.
Please enter your desired user name (usually not your first and last name), your email address and other required details in the form below.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On



All times are GMT -6. The time now is 10:44 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0 PL2
Copyright Hotrodders.com 1999 - 2012. All Rights Reserved.