Here's a look at what the thin set looks like after it's sponged off...The cracks I was working on were actually so fine the material didn't even stay in there for the most part. That's a relief, as there had been concern that these long longitudinal cracks might be structural. They aren't. They're not deep, and very fine, superficial cracks. Most of the Stupa looks quite good, in terms of the integrity of the concrete. The area around the gau being the one exception...