E-Coating on replacement panels - 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 01-03-2011, 12:21 PM
AntnyL's Avatar
Registered User
 
Last photo:
Join Date: Aug 2007
Location: New York
Posts: 414
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
E-Coating on replacement panels

First, I want to apologize if there is already a thread on this topic. I used the search function but didn't see one, maybe I scanned over it. If one already exists, feel free to slam me, or merge/delete this, Mods. Just let me know where to find it first!

OK, so I received a replacement rear fender from LMC Truck, and it has that black primer e-coating (?) on it. My plan is to finish the fender in PPG D74LF primer to match the rest of my truck (refer to my avatar). So my question is: how should I prep the fender before applying the PPG primer? Do I need to sand off the e-coating? Just scuff it up and shoot the PPG primer? Actually, now that I think about it, I have no idea what that black coating is! Anyone know what they use on their fenders? If not, I'll call and ask them.

Thanks in advance, and again, if there's already a thread on this, please post a linky dink for me?

Ant

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 01-03-2011, 12:36 PM
Registered User
 
Last photo:
Join Date: Oct 2007
Location: Portland,Or
Posts: 838
Wiki Edits: 0

Thanks: 0
Thanked 43 Times in 37 Posts
I would contact LMC truck. Post back what they tell you, I might be getting some LMC panels in the future.

"PPG D74LF" Is this a misprint? Did you mean PPG DP74LF, with actvator?

I have the PPG data sheet on DPLF. and you should too.

If you cannot find out what is on the panel, I would sand it to bare metal, and then prime it with the DP74LF. Optional, use the DX1791/DX1792 wash primer, under the DPLF.
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 01-03-2011, 12:55 PM
Underground's Avatar
Registered User
 

Last journal entry: 54
Last photo:
Join Date: Oct 2009
Location: Higginsville, Mo
Age: 42
Posts: 348
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Wipe a rag soaked in lacquer thinner on it. If it lifts the black primer then strip it off. I have had floor pans that the primer lifted. If not just sand and refinish.
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 01-03-2011, 01:11 PM
AntnyL's Avatar
Registered User
 
Last photo:
Join Date: Aug 2007
Location: New York
Posts: 414
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Quote:
Originally Posted by DanielC
I would contact LMC truck. Post back what they tell you, I might be getting some LMC panels in the future.

"PPG D74LF" Is this a misprint? Did you mean PPG DP74LF, with actvator?

I have the PPG data sheet on DPLF. and you should too.

If you cannot find out what is on the panel, I would sand it to bare metal, and then prime it with the DP74LF. Optional, use the DX1791/DX1792 wash primer, under the DPLF.
Daniel, yes activated DP74LF. Thanks for catching my mis-print.
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 01-03-2011, 01:24 PM
AntnyL's Avatar
Registered User
 
Last photo:
Join Date: Aug 2007
Location: New York
Posts: 414
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Update: I spoke with a customer rep at LMC, they say it's an "EDP" coating, and intended to be left on, just clean it, scuff and shoot the finish coats onto it. To be safe, I'll test it with the lacquer thinner as suggested here first. If it lifts or otherwise comes off, I'll take it down to bare metal. If not, scuff and shoot.....I guess.
Reply With Quote Quick reply to this message
  #6 (permalink)  
Old 01-03-2011, 02:07 PM
Registered User
 
Last photo:
Join Date: Nov 2010
Location: southern Virginia
Age: 61
Posts: 88
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
I use aftermarket parts all the time. just clean with wax and grease remover, sand ,seal and paint according to paint mfg directions. This coating is said to contain rust inhibitors and shouldn't be removed. If it is removed a self etching primer should be used on bare metal.
Reply With Quote Quick reply to this message
  #7 (permalink)  
Old 01-03-2011, 02:19 PM
Registered User
 
Join Date: Sep 2007
Location: In The Garage
Posts: 334
Wiki Edits: 0

Thanks: 3
Thanked 6 Times in 6 Posts
Quote:
Originally Posted by AntnyL
Update: I spoke with a customer rep at LMC, they say it's an "EDP" coating, and intended to be left on, just clean it, scuff and shoot the finish coats onto it. To be safe, I'll test it with the lacquer thinner as suggested here first. If it lifts or otherwise comes off, I'll take it down to bare metal. If not, scuff and shoot.....I guess.
Yep, go ahead and scuff and shoot. The EDP is high in zinc and
protects the metal underneath from oxidizing/rusting.
Reply With Quote Quick reply to this message
  #8 (permalink)  
Old 01-03-2011, 03:05 PM
swvalcon's Avatar
Member
 

Last journal entry: rust on lt body shell
Last photo:
Join Date: Oct 2004
Location: mn
Age: 64
Posts: 1,014
Wiki Edits: 0

Thanks: 0
Thanked 11 Times in 11 Posts
I have faith in the factory e-coat that I'll just sand good and prime and paint. The after market stuff especially the crap from overseas I don't trust. That I'll sand to metal, a coat of spi epoxy ,and go from there.
Reply With Quote Quick reply to this message
  #9 (permalink)  
Old 01-03-2011, 03:15 PM
Registered User
 
Last photo:
Join Date: May 2009
Location: Macedon, NY
Posts: 468
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Funny you should post that question. I just got certified for waterbourne paint two months ago and that was part of the test.

First, never trust what a supplier or manufacturer tells you, yeah, that was on the test.

Use thinner on a piece of rag only, not wax or grease remover or mineral spirits, just thinner. If itís soluble or lifts then you must remove coating. Also, take a piece duct tape and firmly adhere it to the panel then rip it off. If the coating lifts with the tape then remove coating. Those are the proper methods to use to determine if the coating should be removed.
Reply With Quote Quick reply to this message
  #10 (permalink)  
Old 01-03-2011, 03:20 PM
302 Z28's Avatar  
Last photo:
Join Date: May 2003
Location: North Texas
Posts: 10,837
Wiki Edits: 0

Thanks: 1
Thanked 86 Times in 73 Posts
And if you apply PPG DPLF you can also try the lacquer soaked rag on it, but be prepared to substitute something better and cheaper like SPI when it wipes right off .

Vince
Reply With Quote Quick reply to this message
  #11 (permalink)  
Old 01-03-2011, 03:57 PM
Underground's Avatar
Registered User
 

Last journal entry: 54
Last photo:
Join Date: Oct 2009
Location: Higginsville, Mo
Age: 42
Posts: 348
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Quote:
Originally Posted by 302 Z28
And if you apply PPG DPLF you can also try the lacquer soaked rag on it, but be prepared to substitute something better and cheaper like SPI when it wipes right off .

Vince
X2. Exact same thing I've heard from several people who have used it.
Reply With Quote Quick reply to this message
  #12 (permalink)  
Old 01-03-2011, 05:25 PM
Registered User
 
Last photo:
Join Date: Oct 2007
Location: Portland,Or
Posts: 838
Wiki Edits: 0

Thanks: 0
Thanked 43 Times in 37 Posts
I would not assume the panels from LMC truck are made in the USA, unless told otherwise.

"And if you apply PPG DPLF you can also try the lacquer soaked rag on it, but be prepared to substitute something better and cheaper like SPI when it wipes right off ."

PPG DPLF is a base coat. It is intended to be topcoated with a paint. I do not normally park my cars, when they are in primer only, were it rains lacquer thinner. I would also think that if the undercoat gets softened by the solvents in a topcoat, that would only help the bond between the primer, and the paint.
Reply With Quote Quick reply to this message
  #13 (permalink)  
Old 01-03-2011, 09:44 PM
Underground's Avatar
Registered User
 

Last journal entry: 54
Last photo:
Join Date: Oct 2009
Location: Higginsville, Mo
Age: 42
Posts: 348
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Quote:
Originally Posted by DanielC
I would not assume the panels from LMC truck are made in the USA, unless told otherwise.

"And if you apply PPG DPLF you can also try the lacquer soaked rag on it, but be prepared to substitute something better and cheaper like SPI when it wipes right off ."

PPG DPLF is a base coat. It is intended to be topcoated with a paint. I do not normally park my cars, when they are in primer only, were it rains lacquer thinner. I would also think that if the undercoat gets softened by the solvents in a topcoat, that would only help the bond between the primer, and the paint.
DPLF is epoxy primer not a basecoat. The problem is, if you can wipe epoxy primer, or any primer for that matter, off with lacquer thinner it has not bonded to the metal. And THERE lies the problem.
Reply With Quote Quick reply to this message
  #14 (permalink)  
Old 01-03-2011, 11:16 PM
Registered User
 
Last photo:
Join Date: Oct 2007
Location: Portland,Or
Posts: 838
Wiki Edits: 0

Thanks: 0
Thanked 43 Times in 37 Posts
You are right, DPLF is a primer. I stand corrected on that.
My point still stands. A primer is not designed to protect against degradation by strong solvents. That is what the top coat does. Even then, I would suggest rubbing almost any paint with a strong solvent like lacquer thinner will cause some degradation, unless the paint was designed to pass this "snake oil barker at a county fair trick"
The reality is that in many cities you cannot even use lacquer thinner anymore because of excessive VOC problems.
Saying a primer will not resist degradation by a strong solvent is like saying it will not hold up to sandblasting. In both cases you are doing something to the coating it was not designed to resist.

Does SPI advertise on this board? Are they a supporter of this forum? Sometimes I wonder if somebody somewhere is getting a benefit by constantly pushing this product line.
Reply With Quote Quick reply to this message
  #15 (permalink)  
Old 01-03-2011, 11:25 PM
Underground's Avatar
Registered User
 

Last journal entry: 54
Last photo:
Join Date: Oct 2009
Location: Higginsville, Mo
Age: 42
Posts: 348
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Quote:
Originally Posted by DanielC
Does SPI advertise on this board? Are they a supporter of this forum? Sometimes I wonder if somebody somewhere is getting a benefit by constantly pushing this product line.
PPG is pushed on this board alot more than most other brands. Do you think that they get a kick back?
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
where to get cheap replacement panels? Bauer1287 Body - Exterior 14 01-24-2011 06:51 AM
Best replacement body panels? Hacksaw Body - Exterior 4 04-27-2009 08:02 PM
Coating on aftermarket panels ( E- coat ) Polish Painter Body - Exterior 3 03-04-2009 10:01 PM
Replacement Panels mechEcwru Body - Exterior 1 11-28-2007 01:58 PM
replacement rocker panels ArmyofOne Body - Exterior 8 01-22-2007 05:57 AM


All times are GMT -6. The time now is 06:46 PM.


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.