All body plastic work done with hand blocks, all block sanding done with an assortment of blocks.
That means NO air tools, because if you dont have the Knack getting right by hand , Air tools will never work for you, all air tools will do is cost you in filler and primer because you cut too much off and have to keep re-doing it .

I have had to work behind a ton of crappy body men in my time, hell they thought they were good but after i showed them how shitty their plastic work was after blocking half the primer off because of high spots, I usually tell them my wife can do better then they could just for how much she has watched me in my garage.....!

Spray