IF you use GUNK, read the fine print on the label. There is only one GUNK product that will not cause corosion on aluminum. Some GUNK will trash your polished aluminum side cases. I have found diluted purple power (a detergent) cuts grease better- BUT full strength can attack paint(Enfield engine crankcase & cylinder is painted).
I assume the stuff Matt sprayed on his bike is similar to WD40. I have been a machinery guy most of my 67 years, & learned to shun WD40 shortly after it was introduced on the market. It WILL dry on the thing you want to protect & make a sticky mess, it is not even an acceptable penetrating oil. I hope Matt gets the stuff off his exhaust before it bakes into a brown coating that is hard to remove. "THINK VERY CAREFULLY ABOUT THE UNINTENDED EFFECTS OF ANY CHEMICAL YOU USE, AT WORK OR PLAY" You can quote me on this. Cheers,Craig