Found a very well kept larger rock sized Classic Maple kit for a very fair price and am seriously considering pulling the trigger. While it appears to be in great shape for its age, I am curious to see if anyone here has had any experience bringing the black cortex,"Rock Onyx", in the catalogs, back to life. Would appreciate any response if you've had a go at it before. Novus plastic polish maybe? Thanks...I'll hang up and listen.