I agree with unsalted.......that is a job for a pro. Take it off and send it to an autobody place or someone that does fiberglass repair/refinish. ALSO..... about 2 years ago, i had some dock rash on my swim platform from big waves (when i was not there). I had to re-gellcoat a section on the corner of the swim platform. I bought 2 kits and did several coats. It took me a bit of research to get the right gelcoat kit/color as there are several that were used on these boats at that time. Mine is a 2000 310/DA and it turned out to be "Arctic White ASH" OEM part 1317858. Ash is short for Ashland i believe (the manufacturer). Not sure what your hull color is, but it may be buried in your hull VIN # somewhere. hope this helps.