Hello, I have created a water feature which is made up of a sheet of plywood with copper pennies on top, looks similar to a penny floor but will be mounted vertically with a waterfall protruding an opening. I am looking at the expo resin range on the easy composites website. I think if this was an internal project it would be the GlassCast 3 but I can see on the forums the GlassCast range are not recommended for permanent external use.

Is there a particular product which would be recommended for this type use. I live in the Midlands, UK so wouldn't expect temperatures to drop much below -5C. The feature will be in direct morning sunlight. Other than splashes the surface shouldn't be in direct contact with water.

Any advice would be appreciated.