Stress cracks and filling holes

[Yamtt125]

I'm in the process of filling in all of the old screw holes on my 20'. How do i get rid of the cracks around some of the wholes, and what should I do about the hole in which the glass rises up around the edges. There are also many chips around the fish box. Here are some pics to help. Any advise will be very helpfull. Thanks
-andrew