The one bad thing about West System epoxy is that it sure seems to blush. For some reason during the curing process, a wax like substance forms on the surface of the epoxy. To ensure proper bonding of the next layer of epoxy, this waxiness has to be removed. I've found the best thing is using bleach water and a scrub brush. Then I lightly wet sand with 80 grit and wipe with a rag. This seems to get most of the yellowish-orange "blush" off. This morning, I was able to bathe the whole boat this way in order to get ready to "fill the weave" of the fiberglass cloth. After the wet out cloth cures, it is a long way from being smooth. It currently still has the texture of cloth. I will use epoxy slightly thickened with glass microballoons (to make it a bit more sandable) to fill the woven texture of the cloth and to build up a sandable surface that I will be able to make smooth.