Anybody got any ideas on how I could rejuvenate an old feed roller in an old colour laser printer which otherwise works ok [and I bought off Trademe for the princely sum of a dollar]?

It feeds ok about 1/10th of the time.  The rest of the time it fails to pickup :-/

It's a QMS Magicolor 2 which is long discontinued.

NB: No idea how much tonor it has left of C M Y, but it has a refilled K, so when C M or Y run out it's going to be a [freaking huge] mono laser printer ;-)