Glazed Used During Saggar Fire

[MMB]

Ive heard some people mention that theyve used glaze a long with the saggar technique and it bubbles or craters the glaze or some other random effect. I wanted to try it during my next saggar fire in my kiln. I was planning to use a low fire clear in select spots. I even thought maybe putting saw dust in the glaze before application. What Im really looking for is pointers in maybe a good direction. I dont mind the experiement and know that if you dont know just try. I would really like to find some photos of work that this might have been done to help in my direction. ANyone?