I have already resided my bank barn and the wood is ready to be painted. I decided on using linseed oil for the base of my paint but can not find any in a larger size than 5 gallon. It is a very large barn, I would like to buy it by the drum. Does anyone know where I can find it not mixed with mineral spirits or anything like that, and any suggestions on how to mix it with paint? I am trying not to buy it already made to save on cost. Any help would be appreciated!