Tropicals & Tender Perennials: Wiskey Keg Planter, 0 by Padre

Padre wrote:
Frank's Nursery had a 50% sale on selected items and their collection of Jack Daniel Wiskey Kegs was one of the items. Solid Oak, weighing about 40 lbs with iron straps. The inside surface is charcoaled [added flavor to the burbon]. Has anyone used them for planting their brugs? I plan to drill drainage holes in the bottom and mount them on casters for ease of moving. Will the old wiskey fumes make the brugs drunk :-). How shall I prepare the inside surface, if at all?