Mainly thinking of the members of the Steam Tent Cooperative, who seem to enjoy a bit of polished copper and brass! But it can be useful for others too. As written before, I am in the process of restoring ( and blinging up) a couple of old military and surveyors tripods, plus some WW2 era military optical devices. Having surface finished and polished all metals ( Aluminium, Brass, Bronze) to a high sheen, I saw that all dulled quickly, specially the Brass and Bronze. So I tried to find a way to preserve the shine. All ( wax, automotive polish/wax, clear coat) either failed or were not adhering enough. Or sticky. But, I found a product from an US company called Everbrite Coatings. I bought the product called Protectaclear No problem with shipping by air, quick and efficient service. The first shipment they made a mistake and send me the Satin, but a phone call and they dispatched the correct Clear ( high gloss) the same day. Fairly easy to use, excellent result. To test it, I polished a piece of Brass tube, treated one half, left the other half untreated. Left it on the dock for a week, in the sun and salt water spray. Treated area no change. Untreated very dull and deeply oxidized. I can highly recommend the product. I have no economic interest or other affiliation to that company.