a while back, I took a bunch of scraps and glued em up to make a few cutting boards and such.... then I thought to use the scraps from the scraps. Figured what the hell, make a few coasters with my grandson. 20 in total. just shy of 4"s in dia. 1/8"+ thick. Cork seemed to be the logical choice for the bottoms. I picked up some 12" x 12" x 1/8" squares from a local craft store. 4 to a pak. I forget the price, but remember it being reasonable enough.
Applied a liberal amount of spray adhesive to the cork (pretty sure it was 3M super 99) and let tack up. Laid out 5 coasters to a sheet. Sandwiched those sheets between 1/8" plywood. Then the whole package between a couple of 3/4" pieces of ply. Weighted down with a 30lp dumbbell and walked away for a few days. After I was sure everything had set and was dry, cut out the coasters with an scalpel (x-acto knife). Easy enough, nice clean cuts. Then took em over to the 12" disc sander, blended all the edges together then took some 180 and rounded over the bottoms. A few coats of spray on poly and a top coat of wax polish.
Cork will take a nice edge, but I don't think it'll hold up all that well. My experience with the stuff is that it wants to chip away. Rounding over the edges really seems to make a huge difference in terms of longevity. Im pretty sure you'd have the same issues when "stamping" out the cork unless you use some really sharp dies.
"..... limited only by imagination"
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