My 2017 VW All Track has two nice chrome exhaust tips, one on each side of the rear of the car below the bumper. Saw over time that they were getting covered in carbon and finally decided to clean them.
Much to my chagrin, the carbon was baked on to the point where no liquid (carb cleaner, gun cleaner, wax, you name it) would even really touch it. And then I tried a brass scouring pad that I had in my tool collection. This stuff worked great! Very light rotating motions took the carbon right off and without scratching the stainless steel under the carbon. When done, I put a little Nu Finish on the exhaust tips. That will burn off in s few miles but right now they look good. I was just floored by the hardness of the carbon coating and have to wonder what the inside of the pipes and mufflers look like. It just the nature of the beast with a GDI engine. Runs like a scalded cat and very smoothly as well.
Much to my chagrin, the carbon was baked on to the point where no liquid (carb cleaner, gun cleaner, wax, you name it) would even really touch it. And then I tried a brass scouring pad that I had in my tool collection. This stuff worked great! Very light rotating motions took the carbon right off and without scratching the stainless steel under the carbon. When done, I put a little Nu Finish on the exhaust tips. That will burn off in s few miles but right now they look good. I was just floored by the hardness of the carbon coating and have to wonder what the inside of the pipes and mufflers look like. It just the nature of the beast with a GDI engine. Runs like a scalded cat and very smoothly as well.