Danno...its just that. They use a flame spray to build up metal thin layer by layer. I've normally heard it used in machining application to build up a rare crank shaft or hard to impossible to replace item, then re-machine to tolerance. They prob. now have an auto application, although I would ask the question about panel warping for obvious reasons.
I would be a little hesitant to do something like that knowing the possibility of warping the metal. I'm going to do some welding Monday and priming that day as well. I'll know more about those items then.