welcome aboard.
go to the restoration forum. look at the DIY stickies at the top of the forum, look at links 14, 15, 18, 2, 3, 4a, and 4b.
everything you would ever want to know about fiberglass is there.
that isnt teak, that is rotten structure wood
for teak, you call Teak Decking. you get a kit of their glue and caulk, you buy some of their teak. then you cut out the old teak, glue in the new teak. caulk it, then sand it.
