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A salt solution would not

A salt solution would not work like this. Salt granules suck up surrounding water, leaving lighter blotches. A solution would not do this. The Aqua spray is actually almost entirely ethanol. I figured this out by looking for the MSDS sheet for it. Pure ethanol is hard to find (trust me, I tried a few days ago!), but learned that Everclear alcohol is essentially the same thing. I picked up a small bottle at the liquor store for $6. I started playing with it tonight. My sprayer is too fine a mist, but you could see the effect.