I used a razor blade to cut the loose strands and pull them off and smooth scrap / sand.

: What I thought was a perfect job keeping the glass clear of loose fiber glass
: strands turned out not to be so. In the morning light of the garage I
: noticed where a couple strands found their way onto my perfect job (haha).
: My, how the gremlins work after you quit for the night. Qestion is, should
: I sand these strands down flush before the first fill coat or should I
: wait till the final sanding? Also, do you feather the stem end reinforcing
: glass before starting the fill coats? TIA
: Steve