At work we just go at it with 1500 grit by hand. You don't
need to go through all the steps other guys say. Just wet sand until the clear is even, as in no black spots or whatever color you are doing. It's hard to explain, the clear will look hazy, it has to be even.
I am curious to see what kind of a difference all the other steps make, anyone have any pics?
Here is a single stage car I did a while back..