Greetings all: Does anyone know the proper paint to use on the inside circumference of Cayman 18" sport wheels? I used the search function and found the Wurth Silber, but I am assuming that is for the outside of the wheels. I picked up a nail this week and took my Cayman to the dealer for repair. They scratched the inside (darker matte grey/silver) paint on the wheel. Any help will be appreciated. Also; while were at it, does anyone have paint match for sand beige interior parts. I have a few knicks on passenger seat side, caused by the seat belt. Thanks in advance for your help.