There were some very valid questions about tarnishing when I listed my last copper shuttle. I found it ever so amusing that there was so much more concern about the copper tarnishing as opposed to the silver tarnishing. Regardless I will address these concerns in this post.
A LOT of hand work goes into each and every shuttle. My precious metal shuttles are finished with a protective polish.
With proper use and storage and an occasional polish on the owners part you can keep your shuttle as shiny as the day you bought it. This includes both copper and silver.
When I say "proper use and storage" I mean that in order to get your shuttle to the point of "tarnish concern" that people have raised you would need to leave your shuttle in the garden for a couple of years.
...now say some people like that copper patina... would that effect thread? Probably, but I think that you could easily put an acrylic coat over the copper to remedy that issue. I am doing some experimenting in that particular area...but it will take a lot of time before I can answer those questions.
I will be away from my computer this weekend so please forgive me if I don't answer emails and questions until early next week.
....OH and P.S
Since I will be away this weekend, I will draw the winner for the Monday MONDO giveaway on Tues 23rd.