Orange peel is a two part problem, too much drying on the surface for the amount of paint under the surface, so lighter coats as mentioned. Also keep an eye on your temperature. With a spray can you can't control load mix, air pressure, add various conditioners, etc... So the paint is prety much going to go on at some minimal coverage level below which you can't control it while getting a decent surface. SOmetime controlling the drying conditions is the only other option. Also, the wet sanded surface will hold the paint back from sliding a little.