I'm suprised to see that Zinnser's Bullseye Sealcoat cleans up with ammonia.
I'm not sure you'd want to run ammonia through an aluminum sprayer
anyway. I would think the ammonia would blacken the ammonia
(oxidized?) since it's got a high pH. Alcohol wouldn't react with
aluminum because it's acidic.
I don't know that the black color would affect performance though.
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