Pros : I experimented with this before I used it on the piece I wanted. I mixed it with paint medium and brushed on and then did a dry powder sift. I wanted a fairy dust effect so went with the dry powder sift. The result is brilliant! I did another by air brushing on translucent. Let it dry and then covered. Just adds a glow!
Cons : All Mica powders need to be experimented with before you use on your final piece. Keep in mind that is has to be fused between glass and even if you brush on wet or air brush wet when it dries it will smear if not covered right away.
Other Thoughts : Be sure and keep it within 1/4 inch of the edge. Any mica not covered with another layer of glass will just fall away.