Quote:
Originally Posted by Diseasel300
What about something like tempera paint? That stuff is water-soluble and dries to a "chalky" finish. I'd imagine if diluted with water before being applied you could make a very thin layer that would do more or less what you want.
One critical piece of information missing here: How long is the water running in the trough? Is it a few seconds, several minutes, or over a period of hours?
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Tempera paint dries and doesn't get washed off.
I can choose how long the water is running. I can run it for 15 seconds or 15 hours if I wish.