Remember my post about my inherited rusty 70-lb. 120 year-old cast iron lawn chairs? Well, here are two of them now, after disassembling (had to cut some bolts), sand-blasting, rust-proof and powder-coating with their historic black/green, and then reassembled with new non-rust bolts. All these precious things need now are waterproof seat cushions.
In direct sun, there is a greenish cast but in shade or lower light they appear black. Except for a little old rust pitting, they look almost brand new. You can now read on the underside that they were made in Bridgeport.
Besides rusting to bits, another reason why these sorts of things are so scarce is because of iron-collection drives during WW1.