Thanks for your comments and ideas everyone. Plan on putting branches and other bits and pieces in the enclosure.
With regards to colour, you cant tell to well in the pics but it sort of has light and dark terracota, like say the canyons would look.
With regards to the cleaning under the ledge, I made sure I could get in there well enough to be able to clean. I'd say she will grow fast so she wont be in there for too long, this was just an experiment to see if all worked well. I plan to put more effort and art work into my next enclosure. Also I primed then coated the cement with waterproofing (a few coats) and through sand on before it dryed then coated with Bondall Terratite from Bunnings. Anyway thanks again, I will post pics when all finished, I have a guy giving me a price on glass sliding doors tomorrow, so not too much longer.