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Old 25-03-2014, 08:51   #16
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Re: Hatch Reinforcement

It appears that the crack is just the glass holding the cored part right? Nothing in the actual hatch lid etc? might have just been chopper gun...
You probably need to grind out the crack and fill with glass in layers, starting with something thin that will get down into the crack, (or maybe just build a more gentle radius with kitty hair.) Then progressively build it up over that with heavier glass.

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Old 25-03-2014, 09:55   #17
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Location: Marina del Rey
Boat: Catalina 30
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Re: Hatch Reinforcement

My evolved plan based on feedback here:

My purpose is to strengthen the area before the damage gets bigger. On the inside of the hatch lid grind out paint/gel around perimeter of the core and some of the edge of core (as pictured above) to give new glass some bite, and layup 3 layers of 6oz cloth with West 105 and 205. Sand smooth and paint the inside of the hatch lid.

I don't want to do anything to the outside of the hatch for aesthetic purposes; its original non-skid and that would just be making the project unnecessarily more complex. I'll snap a picture or two along the way, hopefully this weekend. Thank you all for the feedback.

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Old 25-03-2014, 10:59   #18
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Re: Hatch Reinforcement

Fiberglass is easy and fun to learn. Don't be afraid of it. Do some practice lay to see how strong things are. I use mainly 1-1/2 oz or 2 oz. I generally use 2 oz when the surface isn't exactly perfectly flat such as small divets. I also use 2 oz for my final layer when I have to sand smooth for a finish. That way you don't sand through into the cloth. Most of my cloth is 10 oz. If you need to work it over or into a corner you may want to cut your piece on the diagonal. If your boat is polyester resin then stay with that. When you're finished, a couple coats of Interlux 2000e to seal it before primer and topcoat.
On my fwd hatch, which had a very thin square to let in light I cut it out, layed in glass to bring that area to the thickness of the hatch, then layed in 5 layers alternating 1-1/2 mat and 10 oz cloth. Bullet proof.
Good luck

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