Posted by DaveC on August 22, 2000 at 18:54:28:
In Reply to: wd 40 on valves posted by unknown on August 22, 2000 at 13:17:14:
I have seen trumpets where Dad used WD40 to lube the valves and it reacted with the existing lubricants in the horn and turned everything into a green glue which hardened like rubber. Don't do it!! There are plenty of good lubricants on the market, and, all things considered, the aren't that expensive.