The Stovebolt Site Forums The Shop Area Paint and Body Shop Original undercoating removal

How do you remove the original undercoating on front fenders. It’s like asfalt

Paint stripper containing MEK will do it, but I don't know if it is still made. A friend told me one of the strippers made with acetone would do it, but I haven't tried it. It is like asphalt, because that's about what it is. You can also use a propane or mapp torch and a scraper, but if you are trying to save paint, that isn't a good idea. And if you have any Bondo hiding under the paint, it will be gone with heat. A guy in high school used kerosene, but it sure isn't easy to find today and is very $$$. Diesel fuel might work. Finally a few years ago a fellow told me he bought some tar and bug remover in a spray can (think it was at Wal-Mart) and said that stuff would dissolve it, but it took time. Good luck.

A paint scraper without any solvent would be the first step. Once you get the big chunks chipped off, then to after it with a solvent. Mineral spirits should cut it.

I have been chipping away at it. It’s some tough stuff for sure. I will try some of these ideas. Thanks

If you are going to strip fenders to bare metal top side and under side burning is very fast and harms nothing IF you give the heat from the fire an escape route. Don't burn where fire is on the under side. Photos are of a very pricey 55 Nomad that total floor prep time was done in an hour.

Try to burn approximately a 3'x3' section at a time so can be scraped while still bubbling from heat:
[](https://postimg.cc/JsMvcrQ0)

Much drops off from heat but scrapes off super easy:
[](https://postimg.cc/7JNMxkJt)

A quick spray with low pressure sand blast leaves surface clean:
[](https://postimg.cc/QVBFhs1F)

darn, I wish I had known that prior to spending many hours mechanically removing everything under my cab!

I used a citris-based degreaser and it worked well. Spray it on, let it soak in a while, and scrape off. Much easier than any solvent stuff.

I finally got around to working on the fender undercoating. I heated it up with a torch and it scraped right off. I got a lot more to go so I will try to get pictures. Thanks for the help.