I am in the process of stuccoing a cinder block retaining wall. I'm using premixed stucco for both the base and finish coats. I applied the base coat first and scratched it. Then instead of applying a second layer of base coat, I applied a layer of finish stucco for the second coat--hoping to get away with only having to do two total coats. However, this second coat doesn't look right--in several spots, it looks like it's rippled. Even though I applied the finish coat pretty thick (about 1/3"), I'm assuming I got a ripple effect because this coat still wasn't sufficient to cover the scratches underneath. My question is, is there a problem with applying another (third) coat of finish stucco over the second coat of finish stucco? Or can you only apply finish stucco over base stucco?