Yeah it is pretty funky!
I got a custom satin gold 3C Artisan mouthpiece coming in the mail in the next week or two to go with the Artisan AB190S I'm getting (had to order it, they did not have any left in stock at my store), so my funky mouthpiece will be stored as a back-up. In the near future.
So how does this aluminium foil, baking soda and hot water thing work? I'd love to try it someday, even if it was just on my unused 7C. And I assume it can work with trumpets? Also, can it work with gold plate things or is it just silver? If not, is there a similar technique you can use for gold plating?