I know that Carol and I have had conversations about limewash painting in the past. There is some information out there about this technique that we've read like Yucatanliving.com and some other sites. There is a faux technique but we are more interested in the simple and traditional limewash finish. I would love to know if anyone else, our contractors included, have used this application. Mark was playing around testing this with cinder blocks and hydrated lime. He bought a 40 lb. bag for $4. He mixed a small amount with water (equaling a 1/2 gallon) with to the consistency of buttermilk and applied it. It dried quickly even in this cool climate we've been having. The next day he thinned it down to the consistency of whole milk and reapplied another coat. It looks really good! We have a test block outside in the rain now to see how it weathers. It's a brilliant white and you can purchase pigmented powders in many colors, so that's our next test. We're impressed with how simple and inexpensive this is to do and will keep you posted on how it goes.