Try Krylon Matte Finish (spray) - we used to use it to set ink outlines before painting with watercolor or thinned acrylic and it worked like a charm - can't even tell it's there! You might want to test it on one or two before doing all of them. Walmart had the best price (it's in with the spray paints) that I could see online...
__________________ ~ Sue
Happy for no reason...
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