Its kinda like when you see a patch work quilt paint job. Meaning some primer here and there and what ever else here and there. If you are putting the what ever stuff on, primer or clear or ? Just finish it how you orignally plan to do it. I know there seems to be some that think the junk patina is cute, and put a clear over it. I guess you can get dulled clear as well. Ask the place you get it at how to do it and how it will hold up. And as far as patina, your neighbors and your insurance company will not like it like you do, nor will the person that opens their door on it or kicks it in a parking lot, their comment will be I thought you didn't give a rip how that pile of junk looked, this comment is for the patina lovin folks, I know you want to clear over bare metal.