I was considering getting silver mesh for my old 16v and silver bonnet vent. Think the best way would be to spray them, if done well would look really cool. Not sure if there are any companies out there doing these bits. Best bet would be to try to get some bits from breakers yard, or from Renault dealer, when I inquired about the vent, think it was about 45 quid new, so maybe buy a new one and spray your old one, incase goes wrong or looks sh*te.