Just finished painting 3 tops. Used DuPont automotive paint. Two tan and one gray. Tried adding flattener to the paint to minimize gloss. Mixed per directions on the first one and it still came out glossy. Greatly increased the amount of flattener but still glossy. As it turns out I sort of like the glossy!!
I just painted mine with Duplicolor Truck Bed Liner, part no. 250. It came out pretty good. I got the tip from someone else on this board. He said he did his w/3 cans, it took me 4.5, I guess I have a heavier trigger finger.