Relativly easy

I do not remember the details, but it is on the web. Essentially you imerse the part to be stripped in a solution of water and washing soda. Make an electtical connection to a battery and from the battery to an electrode. Use a trickle charger to keep the battery charged. The current draw will be about 2 amps. I do not recall which way the polarity goes. But you will see where the bubbles form and can easily change it.

This is also a way to remove rust, and it works exceptional well.