> Matt- don't worry about the clear resin turning white opaque with sanding,
> it will turn transparent again with your next resin coat. This will happen
> with each coat sanding and will actually help you see where you've not
> sanded on the final coats. The final varnish will again turn your
> translucent white sanded resin to a beautiful translucent gloss.

It's exactly like water on frosted glass; it becomes virtually clear. I got this wonderful analogy from Nick plans. I doubt that it could be explained any better! The same sort of thing is at work when you wash your car: it looks perfect/clean when wet, but as it dries, all of the scratch marks are made visible again. Only difference with epoxy/varnish is that the surface essentially stays permanently wet.

Hope this eases your mind. :-)

MS