I have one question. I just upgraded my exhaust and installed exposed exhaust tips on my 02 E53 X5 3.0d. I painted my exhaust tips using high temp black spray paint. However, after a few days I noticed once the black exhaust smoke from the diesel exhaust mix with the high temp black paint, the paint starts to peel of slowly. Is there any other stronger high temp paint I should use or some precoating needed to spray to my exhaust tips before I apply the the black paint.....