Longrider, not to say you are wrong, but it depends on what you want. Some colors come out darker or more brilliant with more coats. Apply thin coats, don't do heavy coats. Heavy coats tend to run. As for Clear coat do two because some times with the first you end up with some imperfections and you don't notice them until it dries. As for the best place, find a dry and preferrably dust free environment. If you don't have dust free try and keep it to a minimum.

Rattle cans are not recomended by me at all. The tend to coat on the heavy side initially and taper off towards the bottom of the can.