Posted by Phil Lewis on January 10, 2003 at 12:24:48:
In Reply to: Flushing Chemicals posted by Mark l. on January 10, 2003 at 12:17:20:
I have recently been told by a qualified repair person that a product called "CLR" can be used effectively to flush out brass instruments when used with care.  This product can be purchased at a variety of well known discount stores, hardware stores, and home improvement emporiums.  I have used it somewhat successfully when I have flushed a few student horns, but unless there is a tremendous amount of build up, I still think a simple "snake" works almost as effectively.  There is no replacement for regular maintenance, but if that has not happened, then flushing with chemicals may be necessary.
Good Luck.