There is always more than one way to skin a cat. I have used aircraft striper in the past. Over time and several frame ups I have found the 7" grinder to be the best method for me. And yes I do use a harbor freight 40 pound sandblaster. I've never had a problem with warpage it just isn't powerful enough to generate that much heat. A bigger one could. I'm very pleased with the results. No worries about stripper leaching out a crack or crevice. No worries about paint cracking or being incompatible with the new paints. I have also painted cars leaving the old paint on and using a sealer but the best foundation for a new paint job is what the factory started with, bare metal. A lot depends on what you want in the end.