[codefox1]

Well if the damage is not too bad, try to get the capacitor fully open, and then straighten the blades one by one by hand. I sometimes use a dull knife blade as a sort of an anvil while straightening out these blades.

You should be able to slip a piece of paper between each rotor/stator gap without it getting caught.

When you are able to close and open the capacitor without any obvious binding, testing can be done
Disconnect the leads and put a VTVM across each section. As you close the capacitor, you will immediately know if a short occurs. Use the paper trick to see which plate or plates are touching, and then readjust them.

All this is a lot easier to do if you disconnect the capacitor and physically remove it from the chassis. That way you can really clean it up, re oil the bearings, etc... Take a few pictures and label everything so you will not have any problems getting it together again.

There are probably more tricks out there that others will share.