wasn't it corn starch, not baking soda?
It would be normal in the dark or in the shade till you get in the sun, then it would change Like that Del Sol stuff [dddalong with talc and other "filllers'...lol... but I get what you mean...I've always been leary of putting things into paint to make it do something else...my luck it would change the paint to "Passion Pink" !!!
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