Here you can see it applied to a black clear coat hood. Although it removed the dirt instantly, I left the GreaseMaster on the hood for four days to show it's harmlessness on painted surfaces. It literally wiped away perfectly clean with a damp rag. Far easier than car soap and it managed to do a far better job at removing the dirt than I have found using car soap. Photo: Ryan King, 2006. Click image to enlarge.