The resin and glass manufacturers have some good information and tips on what products to use in what applications, also check out the boatbuilders web ring, lots of information from people in the process of building.
Also remember "Google is your friend" so let me know when you have read through the following sites and perhaps we can come up with a few more.
cheers for all of that guys. Big Wow, this forum is excellent but assumes a foundaton knowledge on the principles. To understand it here, I need to understand the language.