Christ don't use Nitromors it will melt the plastic lens! Try white spirit to start with or meths on a cloth. If that fails and it is super glue you could try chipping it off or failing that fine wet n dry.
Yes got 20mm from Torqen.
Got my wire brush, copper grease, torque wrench, new spacers and lug nuts. So ready to go. Saturday morning. . . . bring it on
Just checking.