Ulysses
Enthusiast
Ahhhh! The old yellowing side sills problem. I can't say for sure what is the best coating, but a lot of people here recommend painting the inside with VHT1500 paint that has a ceramic content. I have just done this recently but it's too early to tell if it's working. In my opinion, the best remedy is to lower the temperature in the side sill. This can be done in many ways. One is to drill holes in the front and rear plastic covering the sills in the wheel wells (Since my car is new, and I'm a chicken, I'm hesitant to do this). Another is to get rid of the mufflers, or completely change out the exhaust system with a more free flowing exhaust system.
