If Hans has never come across this, and I have never seen what you describe, it is probably exceedingly rare or an unfamiliar failure due to some brand new manufacturing method. The engineers at Yamaha will want to know about this as soon as possible.
Not having seen it, I'll hazard a guess based on your description that it looks like oil on water. That rainbow effect is caused by the dichroic nature of a thin film. dichroic simply means the color of the reflected light varies in color depending on the angle of the light, just the way a prism separates light. Since this is a property of a very thin film, it implies that a very thin film is present in the light path. If you can't wipe it off, it must be under the lacquer. My guess is that the lacquer is separating from the metal and your cleaner is forming a very thin film between the polished brass and the underside of the lacquer. If this is the case, the horn will have to be stripped and relacquered, or just stripped and left raw brass. Get your complaint in as soon as possible and demand an explanation. That way it will get back to the engineers. There is no acceptable reason for this to happen. Even if you used the wrong cleaner, there should have been a clear notice not to use it. Hans wrote on 5/6/2004, 10:17 PM: > Blank metal, aggressive sweat, body cream or hand cream - no wonder, > they will react some time. This is normal. So after a year or so, you > should use a bit of metal polish, to polish this away. > > But if the horn turns bright red or deep purple or grass green or even > black in the bell, something might be wrong. > ============================================================ > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf > Of [EMAIL PROTECTED] > Sent: Friday, May 07, 2004 12:27 AM > To: [EMAIL PROTECTED] > Subject: [Hornlist] Weird colors > > Hey everyone, > I just noticed something weird happening to my new 668NDII. It > seems > like the top layer is turning into those colors when oil is mixed into > water > (you got your purple, yellow, green, maroon...) it seems like that is on > my > horn, particularly on the bell. > I never noticed it before, but I whiped it down completely after > every > use, now I just wipe it down (completely) about once a week, and I just > noticed it about 2 days ago. I tried to see if I could whipe it off, but > no, it > still had that oily water thing goin on. Anyone know what it could be? > > Mike > _______________________________________________ > post: [EMAIL PROTECTED] > set your options at > http://music.memphis.edu/mailman/options/horn/hans.pizka%40t-online.de > > > _______________________________________________ > post: [EMAIL PROTECTED] > set your options at > http://music.memphis.edu/mailman/options/horn/billbamberg%40aol.com > _______________________________________________ post: [EMAIL PROTECTED] set your options at http://music.memphis.edu/mailman/options/horn/archive%40jab.org
