I tried it as well since this is an older post. I scarified the surface, then primed it. After that I had to try 3 different paints to get one that didn't come off easily. I used a matte "camo" paint. However I find even with an automotive (matte) clear coat, it scratches really easy when in the woods. Rattle-cans have limited quality. So I went and got in water-transfer-imaged (dipped) in carbon fibre and they use a real automotive clear that is way stronger than anything you can buy in a rattle can.
I would think that the Krylon Fusion paint would work nicely for this.
__________________ PLEASE NOTE THAT DUE TO THE RISING COST IN AMMO PRICES I WILL NO LONGER BE FIRING A WARNING SHOT.
A government big enough to give you everything you want is big enough to take away everything you have.
I'm not as good as I'm gonna get - but I'm better than I used to be. "Life without God is like an unsharpened pencil - it has no point."