Thanks for the reply Jan,

I just checked the microballoons that I have, and it is indeed the brown type (manufactured by PICA). It says on the bottle that it is .005 diameter. But it's the only kind they sell that I'm aware of. So I'm guessing that this dimension is for my benefit, and not signifying that there are different sizes available?

The longest setting epoxy that I have 2 hour. But that should give me plenty of time to do what I need to do. I don't think I've ever seen the 24 hour kind sold at hobby stores. Is that more of a finishing resin?

Mark