How can I paint/protect the door hinge bolts from rust--and make them look decent? They are 5/16" hex head bolts with integral washers, but not painted or plated. I've considered removing half of them, plating black zinc or black oxide treatment and re-installing--then removing the other half and treating them. Best solution would be body color for all the bolts, but short of a paint brush and a lot of patience, I don't know how to do that.
