Who knows how to spray paint. We must have some gurus on here. I know about preparation and have achieved some really good results with rattle cans but I've got hold of a paint gun now and I want to give it a go. So, I need to know things like: What pressure (psi) do I regulate at? Do I need a filter? What do the adjusters do on the gun? What paint is easiest to use? Do I need to mix thinners with it before it goes in the pot ? If so what quantities/ratio? I presume I need to clean the gun after, How? Any other useful tips?