 Exhaust pipe discoloration
Well, I've tried Blue Job etc. and after 30 minutes of riding I'm right back to where I've started. So forget about it. Here is an interesting and insightful test. Hold a sewing needle with needle-nose pliers and place the needle over a candle flame. You will see a wonderful array of colors from a white tip, to cherry red to straw and blue. (this is the essence of tempering steel). Note the colors of the needle after this test. If you choose to hold the needle in your fingers, rather than needle-nose pliers, then you will have at least a steralized needle to pop the blisters.
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