These products are made from mild steel to give many years of use and pleasure with little care.
They are finished with a burnt wax coating which is designed to oxidise gracefully. This gives a lovely rust finish and blends in with plants and surroundings.
To maintain and preserve the metal remove any soil, rub down lightly with an abrasive pad and apply a coat of Owatrol Oil. Then store under cover when not in use.
Owatrol Oil is available here.