: I've got the same thing on a couple of my boats. It won't get any
: worse, but it sure is ugly. The problem starts when the epoxy
: fill coats are not thick enough. Then the glass is sanded into
: and varnish applied. As the varnish gets baked in the sun, the
: glass becomes exposed. I would not put any varnish over the
: spots. It may affect the epoxy repair later. I am going to sand
: the varnish off and re-apply epoxy. I am not going to replace
: the glass. I am not convinced that the structural integrity is
: compromised enough to warrant that much work and expence! Hope
: that helps! :) Roger

The varnish isn't a problem if you remove it chemically, with a paint stripper. Removes the varnish without touching the glass.

The citrus based products do this well.

Bill H.