I need to remove the undercoating in some spots that I have to do
metal/rust repair, like lower 1/4s & outer fender wells etc. so I can get a good weld. I will look at needle scalers, I never thought about using one of those. I do have a heat gun that has 2 settings & gets pretty hot on setting 2. I'll give that a try. I was thinking bed liner spray to replace what I remove too. Thanks for all the good advice, I knew I would get it here.