Insulation paint for PRR S-1 tender.
Picked up some nail polish at Krogers which should make a good insulator paint.
While at HD, I was picking up some electrical tape and noticed these identical 'suitcase' connectors a few feet away from the tape. I'm guessing they get them from 3M.
Two coats of nail polish on the insulated side of the wheels. Let that dry and see if that fixes the shorts when going through my turnouts.