I'll put in a "nay" vote on powdercoating. It is to my understanding (and a friend is a powdercoater) actually a plastic powder that is melted by heat to cure and flow out. Beautiful finish....absolutely. Durable....again, absolutely, but therein lies my feeling it not the best choice for everything. I think it can be too durable for some applications, and a airplane motor mount might be one of them. Powdercoat has more ability to flex than most paint, and in the case of a critical weldment or structure a crack could be present for some time before it got bad enough to show up as a discolored or rusty telltale line. I think a problem would show up sooner through paint. I don't think powdercoating creates an immediate death trap, but I just don't feel it's the best choice. Just my $.02

Lynn