I have an 03’ Ruby and it am getting more and more rust. I took the factory rocker guards off today to tackle some rust and a few of the nutserts are rusting in the hole badly and spin freely. What is the best fix for this? I was thinking of drilling the old ones out and grinding away the rust and using POR or something on those spots. I would then still new holes and install new nutserts. Thoughts and help please.