Sounds like it might not do well in an exterior application. I need to redo the hood bezel on my wife's Saturn Vue. It's not big, so I may check with a wrap place and see if they have chrome wrap.
Probably not. I don't think any spray bomb paints will last. I wonder if a 2 stage clear coat would help but now you are getting into some expense unless you already have some. I might just try it on my marker light bezels.