That's the very shotgun I bought last year. I like it. If by "polishing and other tips/tricks" you mean slicking it up and making it shoot more efficiently, yes. Especially see Marauder's web page on Stoegers - the nickel won't change that advice any.
One of the things I like about the Supreme is that you can change the chokes. I got a second modified choke, and now both barrels shoot the same. It also seems like the nickel cleans real easy. (I never had a nickel gun before.) A SASS member I think of as a mentor thought the nickel was a practical choice, maybe better than blue.
As to esthetics, I think it's garish. I generally don't prefer flashy firearms. If a blued one was sitting next to it at the same price, I'd have bought the blue one. But if the price is right, I'm willing to bend my esthetics some. And that's what happened with mine.
Will I get rid of it because of the nickel? No. It's mine now, and it's grown on me. It's a good gun. If the price is right, get it!