Personally, I think anything "plastidip" looks cheap. Plastidip has it's followers and fierce critics. Kinda like chrome. I would never plastidip or chrome anything on the BMW. But some don't mind it. At least plastidip is easy to use and more importantly, remove.
Have fun though. And post up detailed pics if you do it. The guy from Singapore that did it to his grilles posted pictures so small, they may as well have been thumbnails.