I used some on a fiberglass seat on my daughter's ex-Disney boat. (not a mouse boat,those are plastic)
I did a fast DA sand job ,then laid down a fast coat with a cheap fiberglass brush as we wanted to use the boat in a day or two.
I didn't expect much with that little prep and cheap brush,but I couldn't believe how nice it came out....very few brush marks,and shiny surface....good coverage over no primer,just white over gel coat.
I don't have a current pic,but I just went out and looked at it after sitting neglected since 2008 and it looks flat and dirty right now,but I couldn't scrape it with a screwdriver.
I think with proper prep,multiple coats,proper application, (I was going to spray it,but did it fast instead) and proper storage,(waxing,cover) I think it's be great.