The finish you choose is a very important decision. On custom tops you can have our very low maintenance Durakryl 102 finish which is Food Safe but not intended to be a cutting surface or Mineral oil which is the more traditional food preparation finish. Please know that oil finishes require regular re-oiling to keep them looking and performing properly. Your third option is to receive the blocks with no finish at all. We do NOT recommend this option as wood will gather or loose  moisture depending on the environment. This will cause swelling ans shrinking and could cause the block to fail. We do not warrant unfinished tops.