The thing I would worry about for coating the frame with epoxy, is it being too brittle and cracking. Also, the West epoxy, with fast hardener specifically says that it is not intended for clear coating. West Systems does have a hardener though that is meant for this.

I used 12k tow, and I did not have trouble wetting it out. All I did was do a lot of fairly thing layers. I got 5000 meters of it, because it was relatively cheap in that size off ebay, and after finishing it looks like I have not even used any of the bobbin.