I’m trying to powder coat some VW engine tin orange and not liking the results. It’s dark in some places where it seems to be thin. Am I just not using enough? I am using almost twice as much as I have with any other color I’ve done. Or, should I try a base coat. Say a white base. I’ve used caswell’s hot pink for a friend and it required a white base. I’m thinking perhaps that’s what this orange needs and part of my problem. Anyone else try doing orange right over bare metal and have a similar issue?