Ultrasonic joy

[chris dawe]

One more point I would like to bring up to avoid someone a costly mistake ... is that some liquid /gel rust removers can also destroy springs ...same thing ,they will leave them in pieces

[Kensal Rise]

I beg to expand on Mr. Dawe's caution:

Please include lacquer thinner in the list of liquid dangers. I've recently had a box lock mainspring break on its own accord as it was still installed inside an action. The unit was merely soaking in lacquer thinner for a day. But... the spring was compressed.

Beware of cleaning ANY compressed flat spring in ANY medium!

Your "joy" may be short lived.