For the past few years I have been thinking about building something to control the dust on my 1000' road before I get to my driveway.. I already have a tank and a little 3PH mounted carry all for my tractor. I was thinking about doing what was already mentioned here.. get a piece of PVC, drill holes .. install spray tips.. then spray with whatever is available and or legal. A friend of mine owns restaurants and has offered his used cooking oil.. I think that would work if I strained it well before it went into the spray tank. Not sure what I could reduce it with to make it thinner or if I would even need too. ..