I've buile three boats and made mistakes with all of them, adn with yourproblem i would recommend using a heat gun and go slowley with it using a scraper to pull off the offending tape. I once pulled off the entire outer skin of a strip canoe this way. Just take you time. The nice thing about resin is it responds to heat nicely.

: Okay, I blew it. I put a fiberglass tape strip on... the final
: piece of glass, closing the hull and deck.
: Then I got called away. The weave was not filled completely, I
: thought I could add resin later and fill it...but it stayed
: white and it won't take anymore resin.
: What are my options? Should I resign myself to sanding it off &
: starting over?