Since I live in part of the country that doesn't feel the need to throw food seasoning onto the roads when it gets cold, my 14 year old MINI does not have any rusty parts. Or, so I thought. I found a slight issue with rust in the bolts that secure the side mirrors to the doors. Certainly it's a very minor thing, but it bugged me. And it was only going to get worse over time. At some point, if left alone, it could prevent removal of the door mirrors should I ever need to take them off. So, for about $4 I replaced all six bolts with nice stainless steel ones. I wasn't able to find the correct sized socket cap bolts at my local full-service hardware store, but the Interwebs came to the rescue and offered at least two great solutions for stainless fasteners in that size: McMaster-Carr and Bolt Depot.