[Harp-L] chromatic mouthpiece question

[JON KIP <jonkip@xxxxxxxxxxxxx>]

I've just rebuilt a really good Deluxe 270..Hohner.... everything is as it should be ... a really good horn...

The problem is that  I used a backing plate and u channel from a box of parts that Dick Gardner sent me.... and they're made from brass.

After about six hours of playing, the brass bits turn blackish and the slide sticks...

It takes only a minute or two to clean it up , so this will be a fine horn, but if anyone out there knows of a remedy for brass turning black that doesn't include me drinking something like Kaboom and blowing it into the mouthpiece, I'd love to hear about it.

thanks

kip
los angeles