I put my old stubby exhaust can back on the bike on Friday and as it looked a bit grubby i gave it a quick wipe over with Optiglanz to give it a bit of a shine up.
 What i didn't realise until this morning is that it has totally taken off the lasered BSAU markings on the exhaust. 
Don't get me wrong, the stuff is shit hot at cleaning downpipes, but i wasn't expecting that to happen at all, not that i'd even considered it though!  
