I bought a mid 18th century Mennonite Trencher (used for making bread dough). It is 5 feet long, 2 feet wide and about a foot deep. It has the original hand made wood base as well! So I’m going to make it into a sink for my new bathroom. (I know a shame to cut a whole in it for the drain! But who do you know that makes bread by hand and enough to feed an army? At least it will be used and cherished in its repurposed use). Soooo, the question is… what will be the best way to waterproof it? It has many years of oils from bread dough permeating it so nothing latex would work. I don’t want anything shiny as I want to keep the original look as much as possible. Would a linseed oil be enough protection when used as a sink? What are your thoughts? Thank you!