This stuff. About $15 at the local hardware store. It's just cheap latex paint in olive, brown, gray, black, and tan.
We found over the years its cheap paint. Doesn't last as long as good paint.
Now last year Walmart cleared out their best latex and we just had it tinted, at a few bucks a gallon. Maybe 3 a gallon. Did fine and will last.
I'm over buying the camo paint as it simply didn't last as long as others.