suggestion - get some never dull. Shines as good as brasso without the ammonia. I use it to wipe down the case necks on my long range rifle cases. Got over 12 loadings now on some Lapua .308 and that is all I have ever used on them.
http://www.nevrdull.com/
Just me but I figure there is a reason that all commercial ammo brass polish additives are ammonia free