First, STUNNING! This is going to be aa gorgeous instrument that you will appreciate for as long as you own it. Congratulations!
Second, I know that Adams uses lacquer on their brushed finishes (silver or brass). This seems to wear well and is easy to clean. Look at pictures of the bell of John Morgan's E3. It has brushed sterling silver on the outside and the inner bell is polished. The body of his horn is largely brushed yellow brass (with brushed nickel accents) and some red brass tubing in the tuning slide. It is very attractive, but the visual impact is different than a classic New Standard.
I don't know what the impact would be on the appearance of the satin finish. Surely the polished silver will look great. You don't want the satin finish to end up shiny however.
Doug
Adams E3 0.60 Sterling bell - Prototype top sprung valves
Concord Band
Winchendon Winds
Townsend Military Band