I paid 100 bucks for the 4L kit w/ Gun
I got the kit that comes with the gun, The gun is awesome for a cheap spray gun, just hook it up to some air and your off to the races.
as far as the prep goes, find yourself a orbital sander, and just go nuts. don't take it all the way to the metal, but get most of the clear coat off, otherwise it won't stick all that well. as far as taping goes, just keep a strait tape line and spray right to it. you get a nice clean line when your done.
here it is in the bed of my truck, this was with no dilution. NOTE: its not faded, just dirty, i keep the rubber mat on top of it all the time.
This is the only spot where it came off, but its probably because of me dragging things on the gate.