Hi Bill, Workhorse didn't go out of business someone else bought them out. They were building package cars for United Parcel Service (UPS) last year. I'm a West Coast RV traveler and I get lots of rust on my coach from a liquid solution that California, Oregon and Washington State DOT's put on the Interstate roads, especially Mountain Passes (I'm referring to I-5) when I'm traveling home from AZ. IMHO that stuff is worse then salt! I use a Dewalt battery powered drill with a wire brush attachment to get the rust off then repaint the surface. I bought the wire brush attachment for my Dewalt at Lowes.