The "manual" for my Oskar Aulos advises that the wood veneer should be treated with "fine furniture oil". I have never done it, but I suppose I should to protect it from extremes in humidity, sun, etc. I'm not sure what brand of furniture oil to use, but... In an abundence of caution, I thought I should ask whether there is something I should be aware of before it is too late (besides the obvious of not oiling the woofer or tweeter!).