Help!!!! Primer wont stick - 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 11-22-2002, 06:38 PM
New Member
 
Join Date: Oct 2002
Location: Oregon\Middle East
Posts: 24
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Post Help!!!! Primer wont stick

I am in the process of duing bodywork on my car and when i get done i cover everything up with a self etching and sealing primer but it wont stick at all it looks like the primer itself is shrinking, if any body has any idea help me, the rain has started and i need to get the bare metal covered up quik thanks guys
<img src="graemlins/crash.gif" border="0" alt="[crash]" />

    Advertisement
__________________
Y'ALL come back now Ya heer
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 11-22-2002, 08:32 PM
Halloweenking's Avatar
Fantastically cannibalistic!
 
Last photo:
Join Date: Mar 2002
Location: Spooksville
Posts: 1,353
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Post

Is the surface clean? Whats the tempreture your spraying in? Whats the temp. of the surface being sprayed on? Is the surface scuffed? Are the primer(s) properly mixed with the correct additives if any are to be added?

HK
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 11-23-2002, 10:49 AM
Kevin45's Avatar
Just one of the guys
 

Last journal entry: Garage Toys
Last photo:
Join Date: Jul 2002
Location: Urbana, Ohio
Age: 58
Posts: 3,060
Wiki Edits: 0

Thanks: 1
Thanked 16 Times in 16 Posts
Post

Hallow hit the nail on the head. You have to have the area to be primed scuffed up. The primer needs some teeth to bite into. The metal cannot be cold. The area must have NO wax or grease what-so-ever. Use a good wax and grease cleaner such as in prep-sol to clean it. If the primer is shrinking either you have wax or grease and it is seperating from it, or you have the primer mixed incorrectly. Check the directions, they are printed on there for a reason.

Kevin
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 11-23-2002, 12:16 PM
TurboS10's Avatar
Hotrodders.com Moderator
 
Last wiki edit: Auto Terms and Definitions Used in Modern Engine T... Last photo:
Join Date: Sep 2002
Location: Texas
Age: 37
Posts: 3,463
Wiki Edits: 2

Thanks: 0
Thanked 0 Times in 0 Posts
Post

Kevin, the self etching primer I have used will stick with no scuffing. I would bet there is some wax or improper mixing.

Chris
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 11-23-2002, 02:24 PM
New Member
 
Join Date: Oct 2002
Location: Oregon\Middle East
Posts: 24
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Post

I have scuffed the surface with 80grit paper, i cleened it with prepsol and air temp is about 60degrees and surface temp was probably 50-55?
i guess my main prob was the temp right?
<img src="graemlins/drunk.gif" border="0" alt="[drunk]" /> <img src="graemlins/crash.gif" border="0" alt="[crash]" />
__________________
Y'ALL come back now Ya heer
Reply With Quote Quick reply to this message
  #6 (permalink)  
Old 11-23-2002, 02:25 PM
Member
 
Join Date: Nov 2002
Location: racine,wi
Posts: 35
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Exclamation

etch primer should be used only for bare metal. It has an acid in it that does a couple of things. Helps it adhere to the bare metal and helps to get rid of rust that has started(normally a few seconds after metal is exposed to air rust has already started) and to prevent it from starting. The other guys are right and that you must have the right temperature, surface must be clean and the product must be mixed correctly. As far as a primer sealer, I would use a primer surfacer which is typical primer for filling in bodywork. If the car has other layers of paint the primer you are putting on could be reacting with those layers and cause the primer to "lift". This can look like small shrinking. You might have to sand that all out and apply the primer in lighter coats or strip off all the layers of paint.
Reply With Quote Quick reply to this message
  #7 (permalink)  
Old 11-23-2002, 02:39 PM
New Member
 
Join Date: Oct 2002
Location: Oregon\Middle East
Posts: 24
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Post

Also the surface has been completely stripped down to bare metal
<img src="graemlins/crash.gif" border="0" alt="[crash]" />
__________________
Y'ALL come back now Ya heer
Reply With Quote Quick reply to this message
  #8 (permalink)  
Old 11-23-2002, 02:43 PM
TurboS10's Avatar
Hotrodders.com Moderator
 
Last wiki edit: Auto Terms and Definitions Used in Modern Engine T... Last photo:
Join Date: Sep 2002
Location: Texas
Age: 37
Posts: 3,463
Wiki Edits: 2

Thanks: 0
Thanked 0 Times in 0 Posts
Post

[quote]Originally posted by paintman1:
<strong>etch primer should be used only for bare metal. It has an acid in it that does a couple of things. Helps it adhere to the bare metal and helps to get rid of rust that has started(normally a few seconds after metal is exposed to air rust has already started) and to prevent it from starting. The other guys are right and that you must have the right temperature, surface must be clean and the product must be mixed correctly. As far as a primer sealer, I would use a primer surfacer which is typical primer for filling in bodywork. If the car has other layers of paint the primer you are putting on could be reacting with those layers and cause the primer to "lift". This can look like small shrinking. You might have to sand that all out and apply the primer in lighter coats or strip off all the layers of paint.</strong><hr></blockquote>

I am betting you hit the name on the head. As soon as I read it that sounded like exactly what is going on. I have used self etching to cover a small breakthrough to bare metal when finish sanding primer and have seen it react with old paint at the feather area of the breakthrough.

Chris
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 09:01 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.