Just by accident I found a slick way to soften the undercoating to make scraping easier.
A friend is doing a frame off on a GTO at the same time I'm doing my Chevelle and he had a halogen work light inside the body while he worked. The light tilted down and was shining on the floor for about a half hour. I noticed the metal was very warm, so I grabbed a scraper and reached under the body. There was an area larger than a square foot that was softened and scraped very easy.
We're going to set up lamps when it's on the rotisserie and heat a large area.
I think this is better than a flame or heat gun since it heats a large area.

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Doug, Chevl71
Team Chevelle member #625
Gateway Area Chevelle Club member CM028

chevl71 homepage (http://www.chevl71.homestead.com/chevl71homepage.html)

Every little bit helps! Thanks for the tip.

Doug,

Another great option is a heat gun - can buy one for $30.00 at Home Depot or Lowes.

I used it on my car - it was great, the undercoating once heated peeled off like butter.

Good Luck

Rich

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70 SS - L34
Member # 442
www.chevelles.com/showroom/richr1 (http://www.chevelles.com/showroom/richr1)

http://www.my70ss.com