[Plums]

Talc and micro balloons are different animals. Talc is talc, and micro balloons are small air filled glass bubbles.

Talc filled resin is quite heavy, while ballooned resin is much lighter. If you are filling large areas you should definitely go for balloons, with a smear of talc filler on the outside if desired...

By the way, if you get desperate you can use normal baby talc - smells nice when you grind it too!!!