Help making chalk paint

Anna Ibarra
by Anna Ibarra
I ordered calcium carbonate powder to make chalk paint. However, when I ordered I didn't realized that it was pellets. I've already opened one of the bags and it's been a while now since I've had it. It doesn't come out smooth and goes one so grainy and messy. How can I fix this without being so wasteful with the remaining bags? I hate to trash them, they didn't cost a lot, but hate to be wasteful.
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