Yay undercoating: Historic & Vintage Racing forum: Grassroots Motorsports Magazine

Nov. 6, 2011 11:06 p.m. oldtin Dork

Nothing like laying on your back for hours on end scraping 50-year old undercoating off the TR4 with a torch and putty knife. I'm kinda surprised Mrs. Oldtin allowed me back in the house. I think it's dropped a good 10lbs of crud off the underside and maybe another 15lbs from the back side of the fenders/inner fenders. The rust had lightened things a bit too - but I've been putting metal back as I go. At least now I can touch the little beast without pulling back a blog of grease, goo or road grime. Next up is getting some primer on and figuring out seating and cage.

Weird - can't seem to add pics or preview
Nov. 7, 2011 8:31 a.m. Ian F SuperDork

Have you tried this stuff?

http://www.eastwood.com/under-gone-undercoating-remover-aerosol-17-oz-net.html

I bought a can to try, but haven't used it yet. Does sound easier/safer than the torch and scrap method.
Nov. 7, 2011 9:56 a.m. oldtin Dork

I did a few tests when I first started - comparing heat, cold, mineral spirits and a couple other solvents. From what I've seen, both heat and dry ice were quite a bit faster than any of the solvents I tried. Heat leaves more residue - but once a panel has been heated, the goo tends to lose its bond and will pop off with a light scraping after things cool down to normal. Heat is easier to manage for vertical surfaces. The one thing I was really missing that made my mg way easier than the TR was a rotisserie.

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