I'm wondering what would be a good primer to use for my situation, I don't have a lot of time or space so I'm pretty much doing body work on one panel at a time. I don't have a gun/compressor to spray anything, is there a good primer I could brush on and leave it for a few months until I could paint? I'm getting confused between all the epoxy / latex -can only sit for a week or else you have to re-prime stuff that I've been reading.