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Clean sheets, cheap and easy for mixing epoxy, non-absorbent and I don't have to spend time looking for something to mix on. I happen to have a polishing stick and a mandrel laying on the bench as well. The mandrel is for holding the barrels during polish and allows you to rotate them when working on them.

SKB,
I keep the plastic lid from a large coffee can on my bench all the time to mix epoxy on. After the left-over epoxy cures, I just flex the lid and it falls off. I was surprised it does not adhere better, maybe because it is not clamped. Anyway, it is always there and handy.
Mike

Any good idea is always welcome. Having spent many rears working as a bench engineer the sticky problem of mixing and using Epoxy Adhesive was over years given to the other Engineers in the workshop that did over time sped to other establishments. The idea was to use that two inch wide "Brown Parcel Tape" though it is available in many colours and designs. Just cut a length off the roll it was usually about four inches long and stick it down to the bench top making a small turn over at one end of the tape for making easy removal, to make the area larger just add more tape at the side of the first with a small overlap. The best part of this is that you do not have to hold it when you are mixing it stays put and can not accidently knocked off on the floor or any where else foe that matter. Disposal is simple pull it of the bench top and fold , the tapes adhesive backing keeps it all enclosed if the Adhesive has not set.

I do the same thing with tongue depressors, works great.