 What removes oil and black undercoating but not paint? |
|
|
|
Porsche, and the Porsche crest are registered trademarks of Dr. Ing. h.c. F. Porsche AG.
This site is not affiliated with Porsche in any way. Its only purpose is to provide an online forum for car enthusiasts. All other trademarks are property of their respective owners. |
|
|
  |
| mskala |
 Jun 11 2026, 04:05 PM
Post
#1
|
|
R  Group: Members Posts: 1,950 Joined: 2-January 03 From: Massachusetts Member No.: 79 Region Association: None 
 |
My car used to leak oil from lots of places. After rebuild, now everything's pretty
good. But, particularly from under the oil tank area, oil has got on a large area under the floor and longs. I found accidentally that the CRC Electronic Cleaner doesn't seem to remove paint, but it is so weak that the black undercoat (wurth?) turns into a huge amount of black goo that hasn't really come off the car. I want to save any paint and the white-ish undercoat. Any products that will do this? I assume my paint is the old lacquer type paint. Thanks Mark S. |
   |
 
|
| 930cabman |
Jun 11 2026, 05:03 PM
Post
#2
|
|
Advanced Member Group: Members Posts: 4,700 Joined: 12-November 20 From: Buffalo Member No.: 24,877 Region Association: North East States
|
I would start with Dawn and work up from there.
|
|
|
|
| mark04usa |
Jun 11 2026, 05:08 PM
Post
#3
|
|
'70 1.7 Tangerine Group: Members Posts: 364 Joined: 14-September 09 From: Austin TX Member No.: 10,805 Region Association: Southwest Region
|
Next, I would try naptha it should not affect paint...try on test area first. Naptha (lighter fluid) is highly flammable and you would need ventilation.
|
|
|
|
| Cairo94507 |
Jun 11 2026, 05:15 PM
Post
#4
|
|
Michael Group: Members Posts: 10,669 Joined: 1-November 08 From: Auburn, CA Member No.: 9,712 Region Association: Northern California
|
I use BrakeKleen (the one not sold in CA) and it cleans stuff off easily without hurting or dulling the paint. I never would have guessed it but my buddy Greg has been using that on his cars for years w/no issues on any painted surfaces. As always, if you try this, try it on a spot that you can risk it on.
When we installed my rear glass, we used urethane - what a mess that was because we cut the tip of the tube off so the hole was too big. (IMG:style_emoticons/default/wacko.gif) But it all cleaned up nicely using BrakeKleen on microfiber towels. (IMG:style_emoticons/default/smile.gif) |
|
|
|
| JeffBowlsby |
Jun 11 2026, 05:16 PM
Post
#5
|
|
914 Wiring Harnesses & Beekeeper Group: Members Posts: 9,268 Joined: 7-January 03 From: San Ramon CA Member No.: 104 Region Association: None
|
If its oil-based, paint thinner (mineral spirits) should work and not affect cured paint.
|
|
|
|
|
4 User(s) are reading this topic (1 Guests and 0 Anonymous Users)
|
Lo-Fi Version | Time is now: 11th June 2026 - 05:37 PM |
Invision Power Board
v9.1.4 © 2026 IPS, Inc.