Try this: http://cs.trains.com/mrr/f/11/p/203625/2231960.aspx#2231960
I get my spay bottles a Sam’s Club you can find them with all the cleaning gear. As to put ballast down I use isopropyl alcohol to wet the ballast & a matte medium (do not get the glossy) mix in a bottle (looks like a catsup bottle) that I got at Micheals. Spays are ok if doing a large area if you wet it down good but for ballast I just let it dribble out.