If the epoxy just looks a little white, it is not a problem. If it looks sort of muddy, like it is getting dirty, the epoxy might not be fully cured. If your sand paper is gumming up, this is probably the problem. If the sanding is going easily and you are getting a fine powder, don't worry about it.

> Hi, I just put on the sealer coat and was going to sand down the drips in
> the resin but I noticed that when I sanded, the resin changed to a murky
> color... I keep hearing that you have to sand the resin but why would it
> become clouded? It looks clear and fine before I sanded and I tried using
> a very fine grit w/water also. Would it be better to avoid sanding till
> the last resin coat?

> Thanks, Matt

> p.s.: great message board, wanna thank everyone who answers my questions
> especially Paul Jacobson who wrote a page long answer to my last one.