I’m like a crow in that I like shiny things. My brass whistles especially.
I do two things.
There is a Chiffer that uses the handle zub…something or other. I’m not even sure he is around anymore. He turned us all on to a potion for cleaning brass that was all natural and did not leave any chemical smell or taste like Brasso can. Brasso is what I use to use.
Anyway, do a search because I can not remember the exact formula. It consisted of vinegar and salt. You boiled the vinegar and slowly added salt. Caution: this apparently produces a toxic fume while boiling so do it in a WELL ventilated room.
The concoction works beautifully. You just swab it on and the tarnish just disappears. Then just rinse in water and dry.
If I want my whistles to absolutely glow, I use the above potion and then do a light polish using #0000 steel wool. Just make sure to rinse out the inside. Steel slivers in your mouth are not fun.
I usually just let 'em go for a long time and if I feel like it, then one day suddenly wipe 'em down with 0000 (ultra fine) steel wool and finish with a jeweler’s cloth. I have found this to work very well and easily with no down sides. Be warned, however, that care should be taken with aluminum whistles (depending on the finish). I sold a wonderful whistle to a C&Fer and thinking I was being nice, I polished it down for him and inadvertently removed some of its interesting steely grey finish, which both of us agreed was a “bad” thing.