Nice writeup. I use the Porter Cable 7424 orbital polisher and the klasse "Twins", polish and sealer from eshine. Never use the brush at the car wash unless you want swirls and scratches and no, the spray wax at car wash is not going to protect your paint. If your paint is a few years old it needs a clay job or all you will do is grind all the grit into your paint when you wax.