> Dear Bill: In all my readings I have not found one that indicates that mineral oil deteriorates, oxidizes, etc. Nor have I found that it causes any undesirable effects on wood. On the contrary, it seems to preserve the wood. I used to see mold in some of my hives during the winter months but I haven't seen mold this year. I would be interested in reading literature to that effect should there be any and someone could refer it to me.Best regards. Dr. Rodriguez