go to wal-mart and buy the Krylon camo paint, comes in four colors, olive drab green dark brown, black and sand tan. if possible, (don't know anything about pellet guns!) take the stock off the receiver, clean the stock very well. then wipe down with alcohol and spray a light coat of adhesion promoter, let dry at least an hour. then paint the base color at least two coats to insure good coverage. then just use stencils to mist a pattern here and there, changing colors as you go. here is an example of one of mine with the sand tan base. just to give you an idea on how i do it. there are lots of different ways to do camo, this is just my way.