How much to waterproof?

I finally got around to doing some work on my tear. I am doing the installation of the a/c unit. Making it work is easy, the problem I've had is making it servicable in case the unit dies on me. Anyway, I made a "pan" that will catch the condensation. I glassed it with one layer of 4oz cloth.
I was wondering how much resin would be needed to make it "waterproof"?
Is just painting it on all the exposed wood enough?
Do I need to make another application?
I put some pics on my build journal http://asianflava.journalspace.com
I was wondering how much resin would be needed to make it "waterproof"?
Is just painting it on all the exposed wood enough?
Do I need to make another application?
I put some pics on my build journal http://asianflava.journalspace.com