Steam Cleaner, Handheld High Temperature Pressurized Steamer for Cleaning, with 3Pcs Brush Heads for Kitchen, Furniture, Bathroom, Car

If the lacquer is coming off that easy hot water may work. I have a Bach with a solid silver bell and brass body and when the lacquer started to come off the bell the silver would tarnish and look spotty and really bad, I used a high powered steam wand with a small tip and was able to clean off the bell without touching the valves or slides. now I can just polish the bell we it starts to tarnish. this my work for you without harsh strippers. https://www.walmart.com/ip/Steam-Cleaner-Handheld-High-Temperature-Pressurized-Steamer-for-Cleaning-with-3Pcs-Brush-Heads-for-Kitchen-Furniture-Bathroom-Car/9344405552?athAsset=eyJhdGhjcGlkIjoiOTM0NDQwNTU1MiIsImF0aHN0aWQiOiJDUzQ3OCIsImF0aHBvc2IiOiI0IiwiYXRoYW5jaWQiOiIxODgyMzE5NTQxIiwiYXRocmsiOjAuMH0=&athena=true