I've never heard of this. Sounds interesting, not in a "I want to eat that" way but in a " okay interesting" way.
What does it taste like?
I remember that the potatoes WERE uncommonly good. Like a regular baked potato, just nice and fluffy and good. I can't recall whether they were cooked in the resin or slipped in after baking.
The skin would be crackly and hard-glazed, and not edible. I just did some googling and read that CB stopped it because customers were eating the skins. Not sure if it's true or not but I can see it happening.
I used to hide back where the vat was bc it was sooo warm and cozy back there. I detested being a waitress but I loved dipping and wrapping the potatoes.
This sounded nuts so I had to Google it - apparently this is a pretty common method of baking potatoes, especially outdoors. Who the heck knew? I've found posts about about people eating them at Cracker Barrel and summer camp. I guess people will eat any damn thing.