I have used cloth camo on some of my guns before and works good. But if you have rifle or shot gun. that you are going to use strictly for hunting; paint it you can get camo paints to spray it. and you can be suprised what a nice job you can do.
I started out spraying my shooting sticks then I done my alum. folding chair
and then my rifle..Just be sure to cover parts you don't want paint on use masking tape or vaseline. And it will come out pretty good. I think the hardest of doing it that I was afraid of ruining it. Gunsite