We are ready to purchase a professional model trumpet for our son, now that we know he will continue to play in college. His teacher has recommended the Bach Stradivarius LT 180-37 which our son has tried and loves. It is a big investment for us, and we want this trumpet to be the last one WE purchase for him. The problem is that he has very sweaty (acidic?) hands, and has worn through the silver in many places near the valves of his Getzen, despite always using a hand guard and wiping down the trumpet after each use. We had heard that a lacquer finish is more resistant to corrosion, but our local trumpet store just told us that this isn't true, that lacquer will also corrode. Now we are really confused. Any advice would be greatly appreciated!