I have turned two large maple bowls that I hope to use as matching sinks in a new house. I have been trying to determine what finish I can use to make them waterproof for this purpose as they will be installed like countertop porcelain sinks.
I have heard that I should start by brushing on a low viscosity epoxy resin and let it soak into the wood and cure. I've also heard that there is a two-part polyurethane that can be applied over the top, but has to be sprayed on by a painting expert.
I would appreciate any suggestions on specific products to use for this project and for ideas on the specific steps for finishing these bowls.