gelcoat repair

Hello, So I just bought a 1997 GTI and GS off of a buddy and I bought them without seeing them first because I got a really good deal on them. After picking them up and looking through them I found some damage on the hull of the GTI. These are the first skis I have owned so I'm not sure how...

Ok I appear to have dinged the underside of my black hull against the trailer somehow, there's a chip under the bow that goes clear thru to the fiberglass I just noticed the other day. Eeek! So I pulled out my trusty Gelcoat International SeaDoo 2006 Black repair kit today... to find it had...