If its coming out rough then u are doing one of two things wrong.. 1 either u didn't not prep good enough and it not wanting to lay down properly or 2 you are applying it in direct sunlight..
I've done 4 sets of wheels, spoilers, trunks, front bumpers and u can not apply in direct sunlight. Sunlight and hot temperatures can cause the plasti dip to dry too fast and not lay down properly..
Plasti dip needs to be applied in thin coats and with each coat apply it thicker.. I usually apply 6-8 coats on anything I spray..
2000 SVT Lightning