I've recently re-stuccoed my house. Ive decided that instead of painting it, I would rather do a limewash. I've mixed several batches with different proportions of mineral pigments trying to get the right color. My problem is, I got a mix that is about the right color and did a test area on the stucco. It looked good except once it dried it was alot lighter than what I wanted, which I expected it would be. Later I sprayed it with a mist of water and suddenly it was the desired color again. My question is how do I retain the 'wet look' without using a sealer or such.