*** Actually, having had it analysed, the black stuff is almost all copper oxide. Nickel silvers version of "rust".
Richard
QUOTE (pedromorgan @ 11 Apr 2011, 20:39)
<{POST_SNAPBACK}>To those fo you that are having problems, can you just run a cinger along a couple of inches of track, see if it leaves a black line on your fingers. if it does then this is dirt and grease and oil and removing it should help your traction.
Peter