You may want to look into Norton paint stripping discs. I use them on a large electric grinder and couldn't believe how well they work. They eat right through the multiple layers of paint and bondo and don't touch the metal. They come in different styles of attachment. I prefer the threaded ones made for electric grinders. I have tried the knock-off brands and found that they don't last as long.

1952 5-window - return to "as built" condition | 1950 3100 with a 235 and a T-5 transmission