This is probably a common problem for anyone who likes to make G1 Transformers look nice and pretty again. Here's my problem. My son has a couple of junker Powermaster Primes his uncle gave him. He wants me to take the best parts from each and frankenstein together one good figure. I've already ordered replacement decals from Repro, but a majority of the screws are completely rusted. Does anyone know of a good chemical I can buy from Home Depot, Lowes, etc. that will eat the rust off? Or better yet, where to find replacement screws? I had this same problem with a G1 Scorponok I just restored, but I was lucky enough to have a broken remote-control WALL-E toy that had the exact same size screws.