alright, so i bought an older bundy for marching from my friend. the horn was his dads when he was in high school but he plays piano so he doesnt need it. i bought it to use during marching band. well during band camp the laquar around the valves started comming off and fast by the end there was almost none left so i stoped useing it and used my good horn for the rest of the seson. now his grandpa was the horn back because he was to start playing (im assuming he played a long time ago) and i feel bad cuz i pretty much ruined the horn and i dont know what to do. is there a cheap way to fix this?