Bondo type products sand fast but they are not the best repair. It will collect water and swell and if water gets to the core of your board it is not good. The best repair is to use West System with a bonding filler to make a paste. The key to the repair is to have the surface clean and sanded to make a good contact. Be neet with your work. Read any body repair manual and apply the West System "paste" like bondo. Let it dry for a day or two the sand it out with sandpaper using a sanding block. You can use 120 - 180 - 220 - 400 progressive in grit.

Once you have it faired in you can buy gel coat and roll it on if you are not handy with air painting equipment. Make sure you add wax to the gel coat so it will dry tack free. From there you can wet sand the dry gel coat 400 – 600 – 800 – xxx.

The other option is to paint it with awlgrip paint it can also be rolled and it flows pretty well. Awlgrip is nasty paint if you do not know what you are doing gel coat is cheap and not as poisonous.

I’ll be repairing a dagger board on a Supercat 20 and document it. I need to get the picture part of my website up then you can see the steps. I've also done other repair work on boats and fabricated parts.

www.themanshed.net