Graphite bottom on 12 WD

I am sanding the bottom of my 4 year old Wood-duck. Its seen much shallow river abuse in Indiana. I am going to put the graphite/resin finish. I'm just doing the bottom part of the hull. How much resin and graphic will I need? A quart of resin? 12 oz of graphite?

Thanks for the help. 

Frank

That should last you the life of the boat. I haven't used that much in the 9+ years that I've had my WD12.

Laszlo