i've done 2 870s and about to do another once it warms above 65 here.. i don't care much for looks, other than i want the thing camoed. i sand the stock (wood or plastic) with 80gr sandpaper and wipe the metal i'm going to paint with acetone 2 separate times. i spray everything with a primer coat, let dry for about an hour, then grab some leaves and start spraying a dab of od green, some flat brown, and some sand color. repeat as needed to cover any place you missed. after i'm satisfied with the camo i spray on a clear coat (flat). done. if any paint wears off i just wipe the area off and hit it with a single spray of some flat color used in the original paint job. i admire many of the first class paint jobs i see on the web but i don't have the patience.