We got some metal pans with our new cage stack that have rust and caked on urine. They were free and we were covering them with fleece anyway so I didn't care. My husband though wants to scrub them down with steel wool and put a new coating of something on them since sometimes the animals burrow under or pull up a section of fleece. Since these aren't under wire what's a safe material to spray/paint them with and then what is safe to clean them with? The chin forum had a thread months back on coating the pans before using them to prevent rust from ever happening but I can't find the thread. We didn't do it for our new pans in the other cages but we've been very careful what we use to clean them so we don't strip the galvanized layer off. Most of the time I just use water and dry immediately. Last time my husband cleaned the chin cages and used our green coconut based cleaner we keep for bird cages and items.