\"Self-Etching Primer\" vs. \"Epoxy Primer\".....? Can anyone tell me the difference between these two....or are they the same item? I bought some self-etching primer to coat bare metal. I am still doing some sheetmetal repair and was told that self-etching is the correct stuff, because you can clean it away from the areas you are working on easily and then just give a quick re-spray when you're done. Unlike some of the rust inhibitors I've seen, it can also be topcoated later with "real" paint. I'm also seeing a lot of guys using Epoxy primers in the early stages of a restoration to preserve the cleaned metal...so now I'm confused if I've bought the wrong thing, or if maybe this is the SAME stuff??? I'd appreciate getting a "brand name" or "product name" for the Epoxy primer if anyone can help me with that. I'm hoping for stuff in rattlecans, since I'm not really setup for "real" painting in my garage...!!!