I have a old craftsman 7" I used to use for all, but now I will only use for cutting, and bought a porter cable random orbital with variable speed (from e-bay) for a great price, works awesome but a little slow but with foam pads it is very forgiving as far as not rubbing thru the paint, I also have a small air buffer 3" for tight areas that works rather well. I use 3m for my compounds that have always worked good for me, however they are a little bit pricey.