You'll want to clean out the chipped areas to some degree. You want a clean, unoxidized surface for the filler to bond to. However, don't want to sand it out to a bigger repair than needed. It's kind of a judgement call.
I'm pretty sure I get your meaning. Here's a quick drawing I did. Is this what you mean as far as preparation? First image = side view, second image = top view.you just want to mechanically key the area and form a 45 degree angled edge while rounding out the wound ( round, oval same same, just not jagged chipped frayed gel coat hole)
Once your happy the wound is keyed and clean...
By this do you mean use the sharp end to poke around in there to expose and eliminate any air bubbles that are trapped under the Marine Tex?with the pointed angled end, apply it right in there. Once your happy there's no void, top out the wound to ever so slightly...
I'm afraid you give me more credit than was due. I was probably never going more than 30 mph. What I said at the end was, "Five O" meaning a 5.0 sail size... meaning I was overpowered on the 5.5 square meter sail I was on while I was filming and needed to rig a smaller sail. A 5.0. Which I did. But an hour later on the 5.0, with all my windsurfing friends who had showed up, I got blown off that sail too!Ha wicked....did you say five o as in fifty mph at the end there, I was trying to judge it, thought about 35 knts or so but did you say 50 !
Thanks for the heads up. Tell you what. I'll take a couple nice close up photos and then some close up video and post them here for you to look at.I can see cracks in the gel coat at the 4.5 inch point on the tape measure and a proper bloke wouldn't have left all those shark fins in the edges