We ran out of time last nine weeks to finish our clay facades...so we kicked off the new nine weeks finishing them up. I had my students use a gouache to paint their clay, and then we used a tempera varnish to finish them off. I feel the tempera varnish is a more economical way to complete the pieces. A little goes a long way..and I find it over all a little cheaper to purchase than clear acrylic. With no hood on my kiln....and limited budget....glaze is not a great option for me at this time!