undercoat removal

[rowingone]

I am repairing a section of my floor board and want to know the best way to remove the factory undercoating. Also what is the best undercoating to replicate the factory undercoating under the car?

[PTRL HD]

If you search the forum you should be able to find some good info. I haven't attempted this, yet, but from memory it is a combination of a noxious stripping chemical (I don't remember the brand suggested but the good stuff is likely outlawed), a putty knife to scrape the goo, then a wire wheel to get rid of the remains. Good luck - I've got to do this soon, too. And they say it's not fun!

[49willard]

I went thru this when I restored my 1960 190sl a few years ago. I initially started doing it with the car on my lift using scrapers. In that I then decided to go ahead and do a rotisserie restoration I finished the scraping process with the body shell upside down or at 90 degrees, much easier. I tried different methods of softening both chemical and heat, very messy and gave up going with scrapers in the end.
In my case I did not reapply any undercoat.

[rowingone]

Just saw a video of a guy using a propane torch to soften and then a wire brush to remove . . might give that a try.

[dlagerstrom]

I have been using an oscillating multi tool with scraper blade. Got a low cost on at Harbor Freight and it has been working well. Get extra blades and you will also need to sharpen them after a while. That will get big strips off. Clean up with a wire cup brush in the angle grinder.

In areas that you can't scrape, the wire wheel or wire cup on the angle grinder work well, just messy.

You can find the Wurth Schutz undercoating that is basically what the factory used.

[rowingone]

Thanks Dave . . good info

[dlagerstrom]

Here is how I know...

[Dpmulvan]

Originally Posted by rowingone

Just saw a video of a guy using a propane torch to soften and then a wire brush to remove . . might give that a try.

Stuff is toxic I’d stick to a heat gun.