I have a very rusty south bend movement, with a dial but no hands.I do not know how it got so corroded maybe underwater, who knows.I have soaked the movement in 3 in 1 oil for about 3 months.
I managed today to coax one screw loose, without breaking it.
I was thinking about soaking the movement in coke to eat the corrosion.

Is this idea alright or someone has a good idea for what i could do about it.
Thanks as always for all help.
I am undertaking this restoration as the 217 is RR grade and a good movement.

Kevin, Instead of using 3 and 1 oil, have you thought of trying a good cutting oil. I have had equally rused watch movements. I keep a spray can of rust cutting oil for jobs on the car. I have used it successfully of breaking rust loose on very rusty watches. Just heavily spray the entire movement, set it aside for a couple of days, then try the screws.

Good luck,

Tom

Thanks Lindell , i think liquid wrench should be available around here.
Thanks for the information on the movement also, i must have read it incorrectly some where.
Tom and Lindell how long would be the longest one should leave a movement in tea??