Removing sunbaked suface rust before priming. - 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 03-10-2004, 06:14 PM
jcarter's Avatar
Member
 
Join Date: Sep 2003
Location: western Manitoba
Age: 62
Posts: 190
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Removing sunbaked suface rust before priming.

Is it necessary to get every bit of surface rust and or old primer off of the roof of my car before epoxy primer? I am using 60 grit on my random orbital sander.The roof is now about 70% bare steel and the rest is either old primer or baked on rust,not pitted or anything,and is smooth across the surface.I can't get the last off this stuff to come off very easily with this sander.I can't use a blaster of any kind in this situation.I tried a wire brush on a grinder, but it just kind of polishes the surface and doesn't take off any more either.A course flap type disc in a grinder would probably make strips and streaks because you couldn't hold it flat enough. I wonder if I go over it a couple more times with say 100 grit on my orbital to smooth it a bit more, if I would have any problems with my epoxy primer lifting or something? What do you guys think? Thanks for any help.

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 03-10-2004, 07:27 PM
poncho62's Avatar
Out of the Loop Moderator
 
Last wiki edit: Streetbeasts links
Last journal entry: at car show
Last photo:
Join Date: Oct 2003
Location: Hanover, Ontario, Canada
Age: 62
Posts: 16,898
Wiki Edits: 5

Thanks: 20
Thanked 260 Times in 213 Posts
If you can't get it blasted, I would get as much rust off as you can. Then give it a good wipe down with a solvent like laquer thinners to get most of it out, and then give a few good coats of epoxy primer.
__________________
Ontario Rodders

Budget RVs
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 03-10-2004, 08:05 PM
302 Z28's Avatar  
Last photo:
Join Date: May 2003
Location: North Texas
Posts: 10,840
Wiki Edits: 0

Thanks: 1
Thanked 86 Times in 73 Posts
I would give it a spray of Ospho, let it sit overnight, sand it down, wipe it with prep sol then primer.

Vince
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 03-10-2004, 08:38 PM
jcarter's Avatar
Member
 
Join Date: Sep 2003
Location: western Manitoba
Age: 62
Posts: 190
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Just spent a couple more hours working on it.Found some 50/60 grit pads in my supply that are working a little better.I've got a few little dents and dimples to get fixed up on the roof and filler to put on where I've patched holes on the lower body.I'm putting the bondo on under the epoxy primer, so will have to do all of it before I prime. I have lots of POR15 Metal Ready and was wondering if I put that on the roof on these areas of light rust, if yhat will create any problems with the epoxy primer?
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 03-11-2004, 05:04 AM
302 Z28's Avatar  
Last photo:
Join Date: May 2003
Location: North Texas
Posts: 10,840
Wiki Edits: 0

Thanks: 1
Thanked 86 Times in 73 Posts
Isn't POR15 a paint like substance? I would prefer Ospho in your situation to POR15.

Vince
Reply With Quote Quick reply to this message
  #6 (permalink)  
Old 03-11-2004, 07:21 AM
Member
 
Last photo:
Join Date: Nov 2002
Location: St Louis
Age: 55
Posts: 253
Wiki Edits: 0

Thanks: 0
Thanked 1 Time in 1 Post
302, The POR-15 metal ready is the same thing as ospho (pretty much the same anyway). Its the company's version they want you to use with their POR-15 paint. I think he'll be able to use it the same way as you say to use ospho.
Reply With Quote Quick reply to this message
  #7 (permalink)  
Old 03-11-2004, 12:52 PM
tundrafiend01's Avatar
Member
 

Last journal entry: No More :(
Last photo:
Join Date: Nov 2003
Location: Tyler, Tx
Age: 31
Posts: 30
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
I have the same problem with the hood on my imp. When you say Ospho metal treatment, is it this stuff or something different?

Thanks in advance,
g
Reply With Quote Quick reply to this message
  #8 (permalink)  
Old 03-11-2004, 01:12 PM
Member
 
Last photo:
Join Date: Nov 2002
Location: St Louis
Age: 55
Posts: 253
Wiki Edits: 0

Thanks: 0
Thanked 1 Time in 1 Post
Yep, that's the stuff, but it comes in other brand names. But that price is pretty high. I bought some Advanced Auto Parts for about five bucks a bottle. I don't remember what brand it is though.
Reply With Quote Quick reply to this message
  #9 (permalink)  
Old 03-11-2004, 01:36 PM
tundrafiend01's Avatar
Member
 

Last journal entry: No More :(
Last photo:
Join Date: Nov 2003
Location: Tyler, Tx
Age: 31
Posts: 30
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Enrust

Anyone have any experience with this stuff? Just curious if its worth the money to have a rust converter and primer in one?
Reply With Quote Quick reply to this message
  #10 (permalink)  
Old 03-11-2004, 01:52 PM
crash3432's Avatar
Registered User
 
Join Date: Mar 2004
Location: IL
Age: 26
Posts: 1
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
your ?

Yes that is very good i would use it on my own vehicle


CURTIS BARNHILL (chevy man)
Reply With Quote Quick reply to this message
  #11 (permalink)  
Old 03-11-2004, 09:47 PM
tundrafiend01's Avatar
Member
 

Last journal entry: No More :(
Last photo:
Join Date: Nov 2003
Location: Tyler, Tx
Age: 31
Posts: 30
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
One More

Did some searching on the Advance Auto Parts web page and found some stuff called Mar-hyde rust converter. Do any of you know if this stuff is along the same lines as the Ospho?
Thanks,
g
Reply With Quote Quick reply to this message
  #12 (permalink)  
Old 03-12-2004, 05:43 AM
Member
 
Last photo:
Join Date: Nov 2002
Location: St Louis
Age: 55
Posts: 253
Wiki Edits: 0

Thanks: 0
Thanked 1 Time in 1 Post
I'm sorry tundrafiend. I meant to look at the stuff I bought at Advanced, but it totally slipped my mind (seems like a lot of things do lately).
I don't think the Mar-hyde converter is what I bought. Basically, what you are looking for is Phosphoric acid. It's generally a blue or blue green liquid. Doesn't come in a spray can as shown on the Advanced auto part website.
I just found this site and it looks like this guy did some serious research, and you may be able to better understand which product is most suitable for your application.
http://www.geocities.com/goodytommy/rust/
Reply With Quote Quick reply to this message
  #13 (permalink)  
Old 03-12-2004, 07:47 AM
troy-curt's Avatar
Shop Owner And Troll Hunter
 

Last journal entry: Detailing Eng. Compartment
Last photo:
Join Date: Apr 2003
Location: Prairie Grove Ar.
Age: 76
Posts: 2,646
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Jcarter, go ahead and sand all the rust off before you put anything on it. Then spray a good urethane primer. And your set to go.

Troy

__________________
If you don't make mistakes. your not doing anything.

69 ss rs full custom camaro 98 ISCA grandchampion
69 ss rs bb camaro wifes driver
66 Elcamino 350/all dz parts,ac,windows,loaded,my driver
69 ss chevelle bb conv.fresh frame off
26 T sedan street rod
Reply With Quote Quick reply to this message
  #14 (permalink)  
Old 03-12-2004, 11:29 AM
jcarter's Avatar
Member
 
Join Date: Sep 2003
Location: western Manitoba
Age: 62
Posts: 190
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Troy-curt thats probably the best advise. I am finally down to what looks more like tarnished metal than a rusty area.If this is primed, do you think there would be any long term adhesion problems?
Reply With Quote Quick reply to this message
  #15 (permalink)  
Old 03-12-2004, 12:39 PM
troy-curt's Avatar
Shop Owner And Troll Hunter
 

Last journal entry: Detailing Eng. Compartment
Last photo:
Join Date: Apr 2003
Location: Prairie Grove Ar.
Age: 76
Posts: 2,646
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
No. Just use a two part urethane primer sealer.

Troy
_______________
If you don't make mistakes. your not doing anything.

69 ss rs full custom camaro 98 ISCA grandchampion
69 ss rs bb camaro wifes driver
66 Elcamino 350/all dz parts,ac,windows,loaded,my driver
69 ss chevelle bb conv.fresh frame off
26 T sedan street rod
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:
If you do not want to register, fill this field only and the name will be used as user name for your post.
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 07:30 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.