: You should use a non-blushing epoxy, do not fill, and do not sand.

: If you have an epoxy that blushes, remove the blush as the manufacturer
: directs, do not fill, and do not sand.
Hi George,
I'm using System 3 epoxy. The reason I thought sanding was required is their directions. I had a look at the "Epoxy Book" and they say sand to clean the "amine cured epoxy surface" before applying further epoxy coats.