Spray it on with overlapping passes, then WAIT until it gets tacky, before spraying the next coat. Touch a painted area with your fingertip very lightly, preferably a place that was masked off. If your finger gets paint on it, it is too wet, WAIT let it dry some. If your finger leaves a fingerprint but does not get color on it, it is ready for the next coat. Spray 1st coat horizontally, 2nd vertically, and 3rd horizontally..
Practice and take your time between coats.. If you let the 1st coat get tacky (Sticky) the next coat will stick to it and not run.
Good Luck,
Dan