: So far I have had pretty good luck with glass and epoxy. Today was not a good
: day. The exterior seam tape is showing white flecks and the margin with
: the previously glassed deck is very noticeable. Unfortunately this is not
: noticeable until the 2nd fill coat of the seam.

: What went wrong? Should I remove the tape?

In my experience, it's very difficult to make a salved egde tape seam disappear. Cutting your own tape strips (bias cut with a roller-type fabric cutter) works well.

Jim