Many thanks gerogiegirl123, LouieT & oskuee. I really appreciate your thoughts. We have delayed a bit due to some indoor renovations but I have started painting out the brown rafters & uprights with Ricochet (fairly light grey with hint of earthy green) and the brown sliding doors with vanilla quake (pale grey) & that has lightened things up without heading too far away from the earthy 1970's vibe. Thanks for the photo ideas. I am keen for a united floor that looks great & is durable but that isn't just one boring expanse of the same material. Perhaps some lighting and a raised planter box in one section that could double as seating would help? Also interesting was the comment on the almost Japanese feel. I stumbled across a Japanese plant in a nursery (cephalotaxus harringtonia fastigiata) that may work as a replacement for the tree ferns which are driving me mad with the spores that settle on everything. We have plenty of indoor projects to entertain us and the ideas for the courtyard are slowly evolving. Thanks again.

Don't know your budget but if it was me I would get some big pots or long - thin flower beds and plant some golden cane or bamboo. The golden cane gives you a nice green screen and looks nice with low maintenance. You can break up the pots with beds of colourful small plants e.g. agapanthus, bush lily etc . For lighting you can light up the beds or pots with outdoor spot lights that can also be solar. Wrap underneath the top wooden hand rail or along one of wires below it some warm light rope light. It's led so little energy consumption. My issue with a outdoor rug is that if left uncared for, water can stagnant and start to smell especially between the rug and the boards. The last thing I would do is get or build a new outdoor set. Styles and designs you can go through pictures in houzz and how to make stuff on YouTube and Pintrest.

Could be the fibreglass one? Possibly FRP Australia? Usually used in industrial applications.

modular decking is available at major hardware stores (Bunnings also has instructions for installation on soft surfaces) and there are several brands available on line