The 1947 - Present Chevrolet & GMC Truck Message Board Network







Register or Log In To remove these advertisements.

Go Back   The 1947 - Present Chevrolet & GMC Truck Message Board Network > General Truck Forums > Paint & Bodywork

Web 67-72chevytrucks.com


Reply
 
Thread Tools Display Modes
Old 02-11-2018, 12:04 AM   #1
mongocanfly
Post Whore

 
mongocanfly's Avatar
 
Join Date: May 2015
Location: Alabama
Posts: 14,557
removing undercoat??

I have the doors off my truck and completely disassembled and ready for sandblasting...I'm not blasting inside the door cavity but I do want to coat inside the door with lizardskin..its got something sprayed in the center of the panel that looks like undercoating...I want to completely remove it but not by scraping or blasting...is there a good chemical that will remove it...its about 1/16" thick...
Attached Images
   
__________________
Mongo...aka Greg

RIP Dad
RIP Jesse

1981 C30 LQ9 NV4500..http://67-72chevytrucks.com/vboard/s...d.php?t=753598
Mongos AD- LS3 TR6060...http://67-72chevytrucks.com/vboard/s...34#post8522334
Columbus..the 1957 IH 4x4...http://67-72chevytrucks.com/vboard/s...63#post8082563
2023 Chevy Z71..daily driver
mongocanfly is offline   Reply With Quote
Old 02-11-2018, 12:32 AM   #2
Foot Stomper
Registered User
 
Foot Stomper's Avatar
 
Join Date: Oct 2015
Location: Calgary, Alberta
Posts: 1,252
Re: removing undercoat??

Tell me why you'd want to remove undercoating that's done a fabulous job of preventing rust only to replace it with urethane bed liner?
__________________
So when is this "Old enough to know better" supposed to kick in?

My 1959 GMC build thread http://67-72chevytrucks.com/vboard/s...d.php?t=686989
Foot Stomper is offline   Reply With Quote
Old 02-11-2018, 12:38 AM   #3
mongocanfly
Post Whore

 
mongocanfly's Avatar
 
Join Date: May 2015
Location: Alabama
Posts: 14,557
Re: removing undercoat??

well I don't have to remove it. ..but as you see in the pics its cracked and coming loose in a few spots...I just didn't want to put something over it only to have the original break loose underneath it...is there something wrong with putting lizard or por15 inside the door?..those bare spots you see in that one pic I didn't remove. .those pieces were laying in the door cavity...that's why I say it might turn loose..
__________________
Mongo...aka Greg

RIP Dad
RIP Jesse

1981 C30 LQ9 NV4500..http://67-72chevytrucks.com/vboard/s...d.php?t=753598
Mongos AD- LS3 TR6060...http://67-72chevytrucks.com/vboard/s...34#post8522334
Columbus..the 1957 IH 4x4...http://67-72chevytrucks.com/vboard/s...63#post8082563
2023 Chevy Z71..daily driver
mongocanfly is offline   Reply With Quote
Old 02-11-2018, 09:55 AM   #4
Grumpy old man
Senior Member
 
Grumpy old man's Avatar
 
Join Date: Dec 2013
Location: Gods country East,Tn
Posts: 8,545
Re: removing undercoat??

Use a sharpened wood paint stir stick and remove any of the loose edges . It's rubberized undercoating and inside the doors was intended as noise suppression rather than rust proofing , I respray the inner doors again with rubberized undercoating after clean up and vacuuming out the bottom , Some thin plastic folded and inserted into the bottom door drains prior to respraying helps keep them open just wait about 30 minutes after spraying the inner door and then pull them out from the bottom of the door ,clean up with mineral spirits . it give the door a more solid sound when closing .
Grumpy old man is offline   Reply With Quote
Old 02-11-2018, 10:04 AM   #5
mongocanfly
Post Whore

 
mongocanfly's Avatar
 
Join Date: May 2015
Location: Alabama
Posts: 14,557
Re: removing undercoat??

yeah that sounds good grumpy....I poked around on it with a scraper thinking the stuff may just fall off but what's still on there is stuck pretty good....I guess ill just clean it as best I can and put another coat on it...there is some surface rust in the bottom I need to clean up somehow or other....
__________________
Mongo...aka Greg

RIP Dad
RIP Jesse

1981 C30 LQ9 NV4500..http://67-72chevytrucks.com/vboard/s...d.php?t=753598
Mongos AD- LS3 TR6060...http://67-72chevytrucks.com/vboard/s...34#post8522334
Columbus..the 1957 IH 4x4...http://67-72chevytrucks.com/vboard/s...63#post8082563
2023 Chevy Z71..daily driver
mongocanfly is offline   Reply With Quote
Old 02-11-2018, 10:42 AM   #6
Foot Stomper
Registered User
 
Foot Stomper's Avatar
 
Join Date: Oct 2015
Location: Calgary, Alberta
Posts: 1,252
Re: removing undercoat??

I agree guys. Grumpy posted what I should have elaborated. Sorry for that.
__________________
So when is this "Old enough to know better" supposed to kick in?

My 1959 GMC build thread http://67-72chevytrucks.com/vboard/s...d.php?t=686989
Foot Stomper is offline   Reply With Quote
Old 02-13-2018, 01:05 AM   #7
Scott2
Registered User
 
Join Date: Mar 2015
Location: Castle Rock, CO
Posts: 534
Re: removing undercoat??

I remember being told that dry ice works for undercoat removal so I searched on that to be sure it wasn’t an old hallucination! Found this: https://m.youtube.com/watch?v=wcuLPO36Rmo

There were other videos and info as well, this was the only one I watched. This one shows whacking the metal with a hammer and while you wouldn’t want to dent your door with a BFH it might be worth trying with a softer rubber mallet?
__________________
Scott

______________
my '51 build: http://67-72chevytrucks.com/vboard/s...d.php?t=677979
Scott2 is offline   Reply With Quote
Old 02-13-2018, 07:49 AM   #8
mongocanfly
Post Whore

 
mongocanfly's Avatar
 
Join Date: May 2015
Location: Alabama
Posts: 14,557
Re: removing undercoat??

im probably gonna leave whats still stuck tight and just put another coat on top of it...it just had some turn loose and I thought the rest may come off easy but after doing what Grumpy suggested whats left appears to be hanging on pretty tight....
__________________
Mongo...aka Greg

RIP Dad
RIP Jesse

1981 C30 LQ9 NV4500..http://67-72chevytrucks.com/vboard/s...d.php?t=753598
Mongos AD- LS3 TR6060...http://67-72chevytrucks.com/vboard/s...34#post8522334
Columbus..the 1957 IH 4x4...http://67-72chevytrucks.com/vboard/s...63#post8082563
2023 Chevy Z71..daily driver
mongocanfly is offline   Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not 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

Forum Jump


All times are GMT -4. The time now is 04:17 AM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Copyright 1997-2022 67-72chevytrucks.com