Tried potting some brushless motors today for salt water resistance using tape and toilet bowl wax with west marine epoxy. This is the next trial of Marks motor techniques for OpenROV. The last version used a PVA 3d printed mold. He machined some bushings for me too. Just need to put the motors in a lathe to clean them up, spray the magnets in the motor bell with a protective coating, and I'm good to go. Bring it on ocean!