Primer question - 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 10-29-2013, 08:20 AM
Jimbo17's Avatar
Nostalgic Racing Decals
 
Last photo:
Join Date: Oct 2006
Location: Florida
Posts: 150
Wiki Edits: 0

Thanks: 0
Thanked 13 Times in 10 Posts
Primer question

I have a truck and I am in the process of wed sanding the entire truck with 320 and some 280 in a few spots.

There are a few places where I have used filler.

The paint will be just an enamel for this daily driver but my question is I first want to spray the entire truck with a good primer.

My question which primer to use under enamel paint?

Thanks Jimbo

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 10-29-2013, 08:55 AM
Faith - Respect - Trust
 
Last photo:
Join Date: Sep 2012
Location: Ontario
Age: 58
Posts: 3,508
Wiki Edits: 0

Thanks: 192
Thanked 637 Times in 572 Posts
Use a quality Epoxy primer. I prefer SPI Epoxy, it offers great rust protection, makes an ideal substrate for virtually all automotive refinish products, has good sanding qualities, filler can be applied over top of this primer, it comes in White, Gray, Black and Red and is priced properly compared to other automotive Epoxy Primers.

Here is the website and shipping is free.

www.southernpolyuretyhanes.com

The customer service is great as well.

Hope this helps.
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 10-29-2013, 09:01 AM
Jimbo17's Avatar
Nostalgic Racing Decals
 
Last photo:
Join Date: Oct 2006
Location: Florida
Posts: 150
Wiki Edits: 0

Thanks: 0
Thanked 13 Times in 10 Posts
What color primer?

I thing I forgot to mention is that I will be painting the truck a dark red color.

Should I use a darker primer under a red?

The paint on the truck now is a base/clear coat that is a deep metallic red color that was done about six or seven years ago and the clear coat on the roof and flat areas is coming apart.

Jimbo
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 10-30-2013, 04:57 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: 1,873
Wiki Edits: 0

Thanks: 4
Thanked 19 Times in 16 Posts
Red is notorious for poor coverage, I generally use the
SPI red epoxy first, it really helps.
I would use a red that is a little lighter to help the color.
I just finished a topper that was going to be a real bright red
The color chip for the final color was just a shade darker than the truck,
so I mixed a little red with some white epoxy and painted it pink first.
It helped to lighten it ever so slightly.
It matched perfectly.
For a dark red I would have used the red epoxy full strength.
Attached Thumbnails
Click image for larger version

Name:	IMG_2842.JPG
Views:	85
Size:	574.0 KB
ID:	94266   Click image for larger version

Name:	IMG_2854.JPG
Views:	111
Size:	653.1 KB
ID:	94274  

Last edited by jcclark; 10-30-2013 at 05:03 AM.
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 10-30-2013, 05:29 AM
Faith - Respect - Trust
 
Last photo:
Join Date: Sep 2012
Location: Ontario
Age: 58
Posts: 3,508
Wiki Edits: 0

Thanks: 192
Thanked 637 Times in 572 Posts
I understand what your saying and I also understand what jcclark is saying...Dark Red...is only part of the information needed to determine what shade of primer will give you best coverage. It's more the shade of the primer than the color that will give you optimum coverage. I will now need to go back to my Dupont days and explain the value of color.

All colors have a value or degree of darkness and lightness, this value, when used in the form of a primer will greatly assist you in getting the most coverage out of your top coat. What you could do is take a sample of your color (a color chip from your paint manufacturer would work) photocopy it with a black and white photocopier....the shade of the color will come out between White and Black in a form of a gray...the darker the color, the closer to Black, the lighter the color, the closer to White. Whatever shade of Gray the photocopier gives you (a photocopier that has a good balance between White and Black would be great) will tell you what value and what shade of primer you need.

Depending on the darkness of your Red paint, a Red Epoxy may nor be your best bet...a Black or combination of Black and Gray may serve you better. I hope this explains the value of color, if you need more information, let me know and I'll try and explain further.

With respect to the clear coming off of your truck...good advice would be to remove any and all paint and start over...if that's not going to be part of the plan...at least remove the paint from the top surfaces where the paint is "coming apart". If this where my truck and I really liked it , I would take a look at how much I was investing in paint material and ask myself if I wanted to risk putting that investment in over a substrate that is already "coming apart". Reds are real pricey...so give it some thought.

Ray
Reply With Quote Quick reply to this message
The Following User Says Thank You to 69 widetrack For This Useful Post:
AirwolfPJ (10-30-2013)
  #6 (permalink)  
Old 10-30-2013, 09:38 PM
Registered User
 
Last photo:
Join Date: Feb 2011
Location: Kalamazoo, MI
Posts: 1,126
Wiki Edits: 0

Thanks: 62
Thanked 101 Times in 85 Posts
I took one look at Clark's topper and totally learned about breast cancer!
Reply With Quote Quick reply to this message
  #7 (permalink)  
Old 10-30-2013, 11:54 PM
put up or shut up
 

Last journal entry: saying goodbye to the beast
Last photo:
Join Date: Apr 2011
Location: Antelope, Ca
Posts: 2,035
Wiki Edits: 0

Thanks: 562
Thanked 223 Times in 202 Posts
if you're only going up to 320 why wet sand? You can dry sand 320 just fine(depending on paper) and not have to worry about edges with bare metal poking up. If I wet sand a primer and go thru the efforts it will be a 500-600, where the difference is noticeable from a 320 scratch. Just my thoughts. I'd say 320 is pushing it with a bright red but lots of guys do it. When it's all said and done and cured and if you stare at it long enough you might see a few scratches or your metalics will reflect their outline. Don't get that with 500-600
Reply With Quote Quick reply to this message
  #8 (permalink)  
Old 10-31-2013, 08:20 AM
Faith - Respect - Trust
 
Last photo:
Join Date: Sep 2012
Location: Ontario
Age: 58
Posts: 3,508
Wiki Edits: 0

Thanks: 192
Thanked 637 Times in 572 Posts
True Henry, using a coarse grit like 320 and having sand scratches show through is quite common in a base coat paint because base coats are that much thinner than Enamels or Acrylic Enamels. The thin metallic base coat will have the metallic's land in the 320 grit sand scratches and they will very often be visible. With Enamels and Acrylic Enamels this is not as common due to the shear thickness of the top coat....for me, I sand anything and everything with a minimum of 600 wet when spraying a solvent based top coat, and yes you need to be aware of sanding through the primer as wet paper cuts faster than dry but, it does leave a smaller sand scratch foot print and eliminates the possibility of sand scratches showing up in your finished product.

Now, with water born base coats, the base is even thinner than solvent and everything needs to be finished in 800 wet.

Ray
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


Similar Threads
Thread Thread Starter Forum Replies Last Post
Primer question frickenbored Body - Exterior 6 08-08-2010 11:34 AM
primer question old fords Body - Exterior 9 09-27-2009 08:12 AM
Primer question dboyett Body - Exterior 12 10-20-2006 06:37 PM
Primer Question eagle24 Body - Exterior 1 12-20-2005 03:11 PM
using primer question AdamZx23 Body - Exterior 21 02-16-2005 10:53 AM


All times are GMT -6. The time now is 03:50 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.