Finish painting, open the masking tape carefully before the new paint get dry. Why ? because is there any defect, unwanted paints in wrong place, you can clean it up fast.
Start painting. Do it perfectly and keep the nozzle 25-30 cm from the surface. You dont want to get a mess. First layer, just spray it thin and wait until dry. After that you can start to second layer, and so on. Its all up to you if you want to make three or more layer. I've done three layer only.