Good luck with that. Machine Grey is proving to be seriously difficult to apply properly let alone match the surrounding pieces. 8 layers, 3 colors - 2 coats of black base that need to be perfectly smooth, 3 layers of aluminum flake applied so thin that all the flakes lie flat, then 3 coats of clear with the proper tint. I would ask around and find a shop that has experience with this. Others who have done body parts such as spoilers and wings are finding out that it isn't cheap, expect costs to be ~$250 or more.