What Philip said.....

I tried some of it a couple of years back when it was still on LHS selves. It was still being stocked at the time, so you'd expect it to be "good". Near as I could tell, it was bad back then. So I'd bet any you happen to find would have been bad back when it was first put on the LHS self, and hasn't gotten any better.

I'm attaching a chart of what finish goes over an original finish. It's sort of a chuckle that it appears that Aerogloss won't go over Formula "U". Nor will Butyrate. Everything else seems to go over polyurethane.

Are there any covered open areas (like the wings), or is all the exterior wood?