King,

Here is a link to a possible inexpensive solution for your buds' conundrum ...

http://www.chirienterprise.com/WhataLiner/WhataLiner.html

That's for the outside. Have them slather the uncoated cleaned up innards with Breakfree CLP & they should be back in bidness.

There are also several types of coatings that can be applied at home inexpensively using an oven to do the baking.