Years ago I learned a technique for rattle cans that works pretty well. Heat em!. When you're ready to paint, turn on the water in your sink. Adjust the water temp until you can just hold your hand under it. At that point, simply place the rattle can under the stream and leave it there for 3 to 5 minutes (leave the top on). Don't leave it there more than that and definitly don't put it under straight hot water (the bottom of the can may blow out if you do - guess how I learned that). Take the can out of the water, shake it several times, then wipe any excess water from the can and especially from near the nozzel. When you start spraying you'll notice two things. A. there is more pressure behind the paint and B. the paint is thinner (a finer mist). If you hold the can 7 to 8 inches from the surface (and keep it moving when it's over the model), you'll get a thinner coat of paint on each pass than you will from a rattle can that is at room temp. It takes some practice but you can get to the stage that you have very few runs and the fine detail doesn't get drowned in paint.