Hi people, I have a question for you. I have one of the band's cornets, a Besson 600, and ever since I got it 5 months ago the first valve has been sticky. I finally knuckled down to figuring it out today, and there was a dribble of silver plate which had run down the inside of the valve casing. I scratched it off (gently!) with a pointy implement, and now the valve works beautifully. I'm so proud <img> But it's still a bit rough to the touch. I wonder if I should finish it off with something, I dunno, to prevent it tarnishing or something. What do you reckon?