I am constructing a marine ply outdoor structure that needs to be weather proofed & UV resistant. I propose polyester laminating resin & Glass Bubbles for filling prior to hand laminating with woven glass fibre/polyester resin. It will then be coated with a 1 to 2 mm layer of polyester resin, fine copper carbonate powder & fine quartz filler mix to give a matt, weathered copper patina finish. I propose polyester instead of epoxy in order to avoid UV degradation.

A few questions
1.    Which polyester resin to use?
2.    What ratio of thinner & which thinner for the polyester to seal the marine ply prior to filling, etc.?
3.    Is it a good idea to use peel ply after laminating in order to give a good key surface for the final coat ?
4.    Which polyester resin for the final coat & what is the maximum ratio of resin to filler powders?