I purchased my wood frame house, that was built in 1919, about 4 years ago. The prior owners it seems didn't prime the house before painting the house. Currently, my house is peeling. That is to say the paint is lifting away from the wood clabbords. My question is that I am planning on painting and I want to know of a good product to use as a primer to prevent wood rot and a reoccurrence of the peeling. I have a Home Depot near my house and they suggested an oil base. What are your suggestions?