Google rules! I found it sold by a surf board shop, used as an resin thickener for repairs. Sounds like its main use is to fill dings.
I had to dig, but I finally found a reference to micro-balloons, seems like that's what you've got (my second guess was cabosil). Good luck, Brent RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED] Please note that subscribe and unsubscribe messages must be sent in text only format with MIME turned off.
