Thanks.
It's what the guy wanted and he's a happy (at the moment) customer. In his words, "I want it to look like an iron bridge across the River Liffey with 200 years of gloss black paint slapped on it."
OK.
It's only two coats each of high temp primer and paint, as I felt any more would seriously reduce the heat transfer from the fins. I'd have preferred to etch and have it black anodized, but his budget won't allow for it. As it is, My concern is how much hotter than normal the AVL is gonna run.