My first try at painting a rifle actually worked great.
I got some 200 grit sand paper and went over the metal with, minus scope.
Taped it off and greased the bolt and stuff i didnt want paint getting on or in.
Krylon Camoflage Flat colors.
Khacki, Brown, Olive Drab, Black
Did base in black and let it cure, then another coat.
After letting all that dry and cure i held the cans high and "dusted" the rifle.
Let it cure and went out shooting
Blends in perfect out where we hunt.
Actually got quite a few compliments also.. not use to that.