Ok the Fiberglass has cured, and was quiet surprised how easy this stuff is to use.
I then sanded the fiber glass with 80 grit sand paper to clean it up. the long edges I used scissors to get it closer before sanding.
I then mixed up the bondo. I used what it says on the back to do a 3inch circle half inch high with a 3inch line of hardener. Mixed it up and added it to the piece. I know it doesn't look pretty, but bondo doesn't have to because I'll sand that stuff smooth. I have about a 30 minute cure time before I can sand again. Hoping to get it primed and sprayed tonight.