I just bought a basic set of gouache to mess around with to paint quicker illustrations. But I can't seem to get that nice smooth matte finish that I've seen in other's gouache paintings. Mine is lumpy and streaky or if I water it down it just looks like water colors and isn't that nice chalky matte finish. I've spent an hour wasting a lot of paint trying to figure this out. But I've got nothing. I have zero idea what's gone wrong. I want that nice crisp finish with no visible brush strokes.
I'm using Winsor & Newton Designer's Gouache, not that I even sort of think it's the paint brand. It's totally me.
I'm painting on un-gessoed paper.