FMX, although I don't know about the flame prosess, I can suggest about the grill and bumper, don't flame the grille, what you might want to do is somthing I did to my hood ornaments and emblems, I wanted somthing cheap to refinish the ornament's with because they had been primered b4 and the chrome was badly pitted. I took some dupli color chrome spraypaint and some duplie color clear and primer, steel wolled the surface primer smooth and feather edged the flakes by doing so also, built the surface up with 4 coats of primer then used the chrome, 2 coats of chrome then 3 coats of clear, unlike I wanted, it does not keep the chrome luster, it makes it even better, it gives it more of a cool looking metallic light grey and looks nothing like chrome, it will look good agens't the dark purple I picked out for the car, you can test to see what it will look like on any metal for less than 10 bucks, I would post a pic of 1 of the ornaments but it just looks str8 grey in the pics.