Since the forums so dead, thought I'd post something. LOL ends up there's not any paint bubbling. I changed lighting in my living room and thus, ended up, I'm just seeing a shadow from a very slight "run" on the top of the filler tube I'd never noticed before. With some new halogen "spot lights" I recently installed shining down from directly overhead, it now shows up. Ha Ha. Check the difference between light moved just slightly to the side vs directly overhead. I made an assortment of stainless steel trim rings just incase I needed to cover a poor re-spray for nothing I guess.