needle scaler

So, it totally depends on the undercoat in question. If it's set up nice and stiff, the needle gun works great. Keep it at a really shallow (30*) angle and go nuts. If the undercoat is still pliable or soft at all, the needles will just smoosh it around and make a mess. The Mustang I just did had some of each. I got most of it with the cheap HF needle gun in record time, did the rest with a combination of heat/scraper and angle grinder with twisted wire brush. The nice thing about the needle gun is that the undercoat will come off in big chunks. It's messy, but not nearly as bad as with the wire wheel. My advice is to do as much as will cooperate with the needle gun, _THEN_ switch to heat, and _THEN_ wire wheel. If you do it in that order, dry chunks in weird corners and seams will come off easy. If you do it in a different order, really annoying bits that would have chipped right off will soften and be a PITA with the scraper.

Absolutely agree that hearing protection is _REQUIRED_.