There are such regulations in such states, and the paint in question is most easily found with a slight markup under the Testors brand for model making.
As for using the ones made for gas for water, the ones for water are FDA certified for water. I'd want to find out if there were any chemical differences other than the dyes between red and blue.
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-IronRaven
When a man dare not speak without malice for fear of giving insult, that is when truth starts to die. Truth is the truest freedom.