How are you Chrissy? I didn't realise it had been published but yeah, it works pretty good. Would have cost a fortune for all the "terracotta" I have now. I will try the sandstone out as a flooring soon.
Australia has had a couple of things I would have liked had they been available here: (1) a really good natural fertilizer used for proteaceae in South Africa and (2) a copper paint for exterior plastic pots. I'm not sure if the Americans have copied the latter but never could get the former. That's one of the great things about travel or virtual/web travel - see how things are done elsewhere!
Terracotta paint is available in the Chicago and suburban area in handy spray cans in the hardware store and craft centers. It is about $6.00 a can and will do several pots. I have used it to make old faded pots look like new and to change plastic black and green ones to match the others. I have also used the stone finish ..comes in handy spray cans, also ...covered my husband's old bowling ball and set it in my garden like a little stone garden sphere ornament ...has lasted several years, with no special extra coating or sealant (same with the terracotta spray paint ...nothing was put over the original spray finish and they are holding up fine!) ...left it out all winter, too!!
Laikalee: I have seen copper-colored spray paint for plastic in Walmart and other stores, such as home improvement type stores. Look for spray paint (I think it is Rustoleum or Krylon) with the word "Fusion" on the label. It comes in metallics, such as copper, as well as regular colors. I used a bronze-brown metallic color on some plastic pots. They look quite good. If you can't find the metallic copper Fusion paint, look for a plastic primer in a spray-paint can, and then use copper spray paint over that. I have gone that route, too, but the Fusion saves the primer step.