I do appreciate what it is your trying to do here Bigus but truly old mate, to answer your questions in the best way I can think of is this:
Surely there is someone up your way (could even be a good mate of the famous Bigrig perhaps???) who's a spray painter & would be willing to show you & guide you first hand???
You can ask all the questions you want on the subject but you will find that most ppl in the industry will have they're own way of doing things & so, so much of it is relied entirely on touch & sight, non of which can be explained or experienced on a forum post.
There are many on our wonderfully vast knowledge based forum with tones & tones of genuinely excellent advice but the truth to it is, if you truly want that end result then stand beside someone who knows & learn first hand.
Its the best way I promise you.

