I have been using Intergrain stains on my hives, but Cabots or Sikkens are also very good. Just make sure they are water-based and U.V. resistant. I have found Ultradeck to be particularly good. Tung Oil has been used on many a hive however your timber will go dark as moisture breaks through the surface depending on where you live and the humidity but you will be lucky to get a year out of it. Just make sure whatever you decide on that you apply at least one coat prior to assembling your hive so that the treatment is applied into the joints. Painting the inside of the hive is not necessary.
