Part of my slowly but surely restoration includes wire wheeling all the nuts and bolts and washers (in the engine compartment, no body stuff yet) to shed the rust and stains and they are coming out great. The only problem is, the surface rust is rapidly returning. So my question is, what is commonly used to protect the bolt heads and such from rusting? Also, what would be the "correct" thing to do for a restoration? I'm not interested in plating them so was thinking of spraying clear on them but I figured I'd ask some opinions first. Thanks in advance.