Ross, we're in the same conditions as you are except we haven't got a greenhouse or grapefruit trees.
My brother bought some Adirondack chairs made out of the plastic-wood decking--Trex or whatever--they are nice because they don't need to be refinished and they are heavy enough so they won't blow away.
I know what you mean about them adding a nice touch to the mood of a model.
Best of the holidays to you.