I have read through the entire thread at different times, I do not remember anybody talking about sandblasting (or whatever media works best)?
Has anybody tried to blast off the food grade liner (red stuff)? and would you still want to burn the chit out of it after?
I would only have access to a cheap sandblaster not a large comercial setup. could not blast with ball bearings like was mentioned about the drums used for the training class in Ohio last week.
Any information or ideas about this would be welcome.