As a hobbyist woodworker, I've been wondering how to protect my projects. I need to try this, great idea, thanks for sharing.
Also...most linseed coatings will mold if they're not kept dry. If you'd like to avoid that, look for purified linseed oil -- it's regular linseed oil, but the proteins that mold feeds on have been removed. If you really want to go crazy, look for the stuff made from food grade oil.