Bought a log sided home that was stained and varnished in 2002. The condition ranges from very good to no finish what so ever and wood in cracked and gray. I dont want to spend the money to blast it but would like to use a solid color stain on it. Do I have to remove all the varnish or can I use some sort of primer or etcher on the wood now before I stain it. Any info or ideas would be appreciated.