Toller wrote:

How about filled with saw dust?
I did that once because I needed a lot of epoxy glue and had a gallon of
laminating epoxy, a sander full of wood dust, and no commercial filler.
Filled with wood dust glued very well, but I never tried to sand it.


IMHO, biggest single waste of epoxy and time is to use any wood fiber
based filler.

Wood flour, saw dust, what ever wood product you pick, there are all a
waste of good epoxy.

Lew