I think the operative answer is whether you like the sound that comes out of the horn. Any plating or coating is temporary. I have a gold plated '98 Cannonball alto. At the first sign of flaking I got another alto so that my gold plated horn would keep it's luster. I cleaned it off and put it back in it's case for a while before I came to the realization that no matter how long it lasted it sounded much better being played than sitting in it's case; plus it sounds better to me than 95% of any other altos I've played (the reason I bought it in the first place.) So far, flaking gold plate hasn't changed the tone, and it's no longer a closet queen.
Jcaino had a thread going on unfinished horns vs. lacquered and plated horns. It's super informative; let's just say lacquer over plating may work well if you don't touch or play the horn, otherwise - go for the tone. Apologies to ya' Dr. G.