Sterling...the best that I have found is a "Food Grade" Mineral Oil...or any Unscented Mineral Oil will work...wash the Board good with Soapy Water....Rinse...Use White Vinegar on it to Sterilize it...dry it good...then liberally rub in the Mineral Oil...let it sit 15-20 minutes...then wipe off the Excess...that simple...that's the way I was taught from an Old Italian in a very upscale restaurant back Home