[morzh]

You could try.
I highly doubt that a simple breakage could occur in an immobile coil like the field coil.
It is either a burn or corrosion. Corrosion won't heal by a discharge, and if by some God's miracle it does, it won't be reliable, and burn won't heal, period.

Also, the field coil being an inductance, the spark may not occur / or might occur not there and then where and when you expect it to.

I'm not discouraging you from trying.....but not a good way by any stretch even if it seems to have worked.