I’ve got an older King 2280 Euphonium that was next in the queue, when I pulled the valves out last night to get it ready for a bath over the weekend I noticed the #2 piston was beginning to rust at the bottom.
I remember looking up the serial number at some point and I think it placed it around the mid 80’s. I’ve owned it for about five years and maintenance probably not performed as much as it should have.
However I suspect this is something that may have developed over a longer period than for the time I’ve owned it.
Questions:
1. Anyone experienced the same or similar problem?
1. Now I’ve well and truly learnt my lesson, cleaning will be performed more regularly, will that be enough to prevent / slow the spread?
2. Or, should I be looking to replace this valve sooner rather than later?
3. Is it a case that if one piston is corroded, it’s only a matter of time until the other three start to show up also?
I am starting to worry that it may spread to the remaining valves and other parts of the horn. I’m also thinking the abrasive surface if it gets larger will hamper valve action and / or damage the valve casing.
Your thoughts and experience would be appreciated.
Thanks in advance.
) but does play nice enough so I do not want to give it away. I only use it at my local community band for sit down concerts, the 625 is nice and light for when we march. 
