as above just use striaght colour rather than dicking about with base and clear, its cheaper to buy 2k straight colour and a lot easier to use!! lierally just needs a half coat then a full coat with most or you can do 2 full coats if u wanted. Most paints you usually add 1% thinner to make it flow a bit better too.

Also need to make sure ur using a semi decent spray gun and spraying from 2 - 2.5bar normally but check with the paint supplier first!