I'm prone to picking up someone elses discards just in case. Back before I even had my Craftsman metal lathe someone tossed some thin steel plate left over from some storage lockers they were putting up. It turned out they are a good fit over the bed of my lathe. I often see a post warnig "Don't lay things on the ways." but in a small, crowded shop it's hard to avoid. My shop usually has what little bench space there is holding parts of some unfinished project that had to be back burnered for another more pressing one. For instance, my tablesaw is serving as a table to hold the grinder to sharpen tools while machining the backplate for the new 3-jaw chuck I just bought. Had I not found these plates I think I would have to made something out of plywood to protect the ways whether changing chucks or using the lathe as an assembly table.
Mike
Mike