I just purchased a 1957 Olds Ambassador to mess around on, and it's my first vintage horn. It has got some rust on the top of the horn, but it's not too serious, and the lacquer is almost totally gone (typical for Ambassadors I hear). I love the sound of the horn and its in extremely good condition other than the surface rust and lacquer problem.
My question is this: Is there any special precautions I should take when cleaning my horn? I've never owned a vintage horn and I'm not sure if the "soaking in a tub of water with dish soap" method is suitable for a horn like this. If any of you guys can give me some pointers on cleaning up and maintaining an older horn like this that would be great! I'm likely going to take it in and get it fixed up professionally in a a couple weeks, but I just want to see what I can do on the horn in the mean time.
I apologize if this has been asked already, but I tried a search and saw nothing.