Goona start spraying using my compressor, at mo only looking at something very small (mirrors or Spolier etc, just to get some idea and perfect things, however i have no idea on what i need,

The colour i need is diamond white, and i know i need ot mix with thinner but what raito is that and also how you do youget the colour shade the same as the car? is it simply mulitple coats till it looks ok?
and lastly is there anthing i should know about laquering ?

cheers for any help