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Jul 21st, 2025 | | | | Joined: Mar 2021 Posts: 52 'Bolter | | 'Bolter Joined: Mar 2021 Posts: 52 | How do you remove the original undercoating on front fenders. It’s like asfalt | | | | | Joined: Mar 2014 Posts: 4,209 Moderator, Electrical Bay | | Moderator, Electrical Bay Joined: Mar 2014 Posts: 4,209 | 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.
~ Jon
1952 1/2 ton with 1959 235 | T5 with 3.07 rear end
| | | | | Joined: May 2015 Posts: 9,830 Housekeeping (Moderator) Making a Stovebolt Bed & Paint and Body Shop Forums | | Housekeeping (Moderator) Making a Stovebolt Bed & Paint and Body Shop Forums Joined: May 2015 Posts: 9,830 | 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.
Kevin 1951 Chevy 3100 work truckFollow this saga in Project JournalPhotos 1929 Ford pickup restored from the ground up. | 1929 Ford Special Coupe (First car) Busting rust since the mid-60's If you're smart enough to take it apart, you darn well better be smart enough to put it back together. | | | | | Joined: Mar 2021 Posts: 52 'Bolter | | 'Bolter Joined: Mar 2021 Posts: 52 | I have been chipping away at it. It’s some tough stuff for sure. I will try some of these ideas. Thanks | | | | | Joined: Oct 2016 Posts: 916 'Bolter | | 'Bolter Joined: Oct 2016 Posts: 916 | darn, I wish I had known that prior to spending many hours mechanically removing everything under my cab! 
Last edited by Norcal Dave; 07/17/2022 1:14 PM.
~ Dave
1950 Chevrolet 3600 3/4-ton with 261 engine & T5 Transmission
| | | | | Joined: Aug 2010 Posts: 70 'Bolter | | 'Bolter Joined: Aug 2010 Posts: 70 | 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. | | | | | Joined: Mar 2021 Posts: 52 'Bolter | | 'Bolter Joined: Mar 2021 Posts: 52 | 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. | | |
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