Gelcoat repair question
The previous owner of my boat looks to have had an arguement with a dock. The result of this bring about 5 or 6 hairline cracks parallel to each other about a foot long in length just above the waterline on the starboard aft quarter. There is no flexing so I don't believe there is any structural damage. my plan is to open up the cracks and use some gelcoat filler. Given the cracks are quite long, I'm not too sure what to open up the cracks with. A dremel, angle grinder, use a router with a small bit or something else. Appreciate recommendations and experience.