I've used Mothers on cases with truly amazing results. Can you use it to polish a movement's plates and other parts if you clean them really well after?

Dale,
You might be able to use it but I wouldn't risk it. The L&R watch cleaning solution and rinse does a great job on nickel and gilt plates as well as all the parts. It really makes the jewel setting look great and it doesn't wash out the writing.
I've been using Flitz on cases but only a little bit and not often. Everytime we polish a case we also take away some material. A Selvyt cloth works great to keep the cases shiny. I'm sure others have different procedures but this is what I've been doing.
RR

Dale;

I've used Mother's for 15 years, but NOT on like new/new cases. It's great for older ones to bring back the lustre.

Do NOT and I repeat NOT use this on the movements!!

It will make them shiny all right but will take away all the original finish...they will look like crap when you're done (I tried a scrap movement years ago with the same thought...NOT)

Good Luck!

Thank you guys!