How can I prevent my lug nuts from getting rusty over and over?
Start by removing the lug nuts from service on the wheel. Next, make absolutely sure that all the rust is off of them and that they are completely dry and clean. You will need the smallest size can of clear polyurethane that you can get at the hardware store. Carefully dip the clean, dry, rust-free lugs into the polyurethane briefly and then slowly remove them. ONLY dip the exposed parts of the lug nuts – don’t let the polyurethane get on the threads! Now, sit the threaded, open part of the lug onto something to allow it to dry – like a pencil standing up. The idea is to allow the lug nut to dry thoroughly, and the finish to be light and even. When the polyurethane on the lug is completely dry, remove it from the drying stick and gently sand off any excess that flowed downward – making sure not to sand the areas that are visible after installation. Depending on your area and how much weather and road salt they have to endure, the lugs should nw go a few years without rusting.