Hey there, first time poster here. I am restoring my 01 Silver B gasser, just about done except for the box. During the sanding and cleaning of the box there are a lot of bare metal areas, about 30% of the box and shroud are down to bare metal. I was going to use high heat ultra on it with a high heat primer first. After reading the instructions and doing some research, it recommends NOT using primer. Has anyone used the Rustoleum HH ultra on bare aluminum box? Any suggestions? I would hate to paint and just have it peal or chip right off. Thank you in advance... Happy 4th!!!