Scarva GZ2150 Zinc Free Multi-Purpose Leadless Stoneware Transparent From  £11.28

Bought the brush on due to good reviews of this glaze but it has gone milky / cloudy on all the black stoneware I used it on. I work in black and white so had bought this for both and as had seen no warnings that this may misbehave on black clay on the description nor reviews. Had previous good results with botz pro on same clay :(