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steve357_tx wrote:What do you think of flushing out your rotary valve tuba out in the yard with a garden hose...?

That's the standard approach for those who live in warm enough climates and who don't have big enough bathtubs.

Just be careful. I would remove the slides and valves first, and then play the water through each of the branches. Use a hose that has a plastic tip to avoid scratches and accidents.

Rick "thinking this gets a lot of stuff out, but is not a replacement for a proper chem clean" Denney

that would be a good idea.

Do NOT do this example,
Do not take your horn to one of those automobile car washes that have the high pressure hoses. The pressure works awesome on taking off all the grime and green stuff but it also weakens/takes off some of the plating on the valves, causing your valves to start to stick among other things.

Things you do when you are young,

Albert

runelk wrote: Do NOT do this example,
Do not take your horn to one of those automobile car washes that have the high pressure hoses. The pressure works awesome on taking off all the grime and green stuff but it also weakens/takes off some of the plating on the valves, causing your valves to start to stick among other things.

You're supposed to take the valves out first

Might help in removing that flaking laquer too.