[1crosscut]

I've use straight Penetrol to protect the bare metal on the faces of the flywheels on my hit and miss engines. Had it on some of my engines for years now and it still looks great. Also is a good coating to protect polished brass. It is a paint additive one can get in most any hardware store. Makes oil based paints flow so brush marks don't show. It is listed as a bare metal protectant on the label.

Perhaps another option would be to use a 50/50 mix of boiled lindseed oil and turpentine.