This one turned out well enough my wife kept it in the house! Old wooden roller from a wall paper embossing machine, mounted to a lightened, steel flywheel from a Lotus FORD 1600 c.c. Twin Cam engine. It was in the back of a Cooper T76 Formula B car I raced in the ‘70s. Replaced by an aluminum F3 unit. Clear coated the rust and left it alone! Smile, every time I look at it!