Again on butcher block counter tops:
We are not sure what the best finish will be. Options are to wipe occasionally with mineral oil as we would a cutting board, or a more permanent finish such as waterproof spar varnish or a water resistant finish such are Minwax water based polycrylic.
We see the disadvantage of mineral oil as the need to frequently re-apply along with difficulty in keeping it off adjacent paintwork during reapplication. And the problem (perhaps) with a brush on finish is that if someone mars the countertop, it'll leave a chip that has to be repaired (whereas with mineral oil, one would just treat the scar).
For info, these are in an infrequently used guest kitchenette.
Thanks in advance