Hmmm, quartz in what as a primer? Seems like that would mostly provide mechanical bonding surfaces. I am using a natural hydraulic lime which has had no efflorescence problems. I have tested up to 15% pigment, resulting in very saturated colors with no crazing yet. The maximum pigment load is on my list of things to test. My experience is that successfully achieving the finish has as much to do with your substrate and your application technique as your mix.

The end of my base plaster delamination saga is in sight; the clients have decided on a cement stucco base plaster, and my tests over it look good. Un-kosher, I know, but what else can I gaurantee over Durarock?

Kirsten