Just food for thought.....are you going to use same airless sprayer to apply stain? Be careful if you are, I've had experience using my airless to multitask....the problem being, you may not get 100% of one product out of your pump before you use something else. I had light colored latex paint come out of my sprayer right in the middle of staining a deck with semi trans oil based. It WASN'T pretty!!!!! haha

Mark
BSD PRessure Washing