The rock wasn't so bad really except the plastic looking finish, it looked like imitation Granite which hardly weathers at all.
you now i was looking to make fake rock here at home and found a very good site, in Australia and even bought the CD (still not tried it though) but one site i looked at boasted they made the rock for Colchester zoo........ i must say it looked good on the website so maybe they have got better at it.
I'm not so sure; there doesn't seem t be very much left to do. Indoor substrate and bottom viewing areas. Early January by the very latest, but everything does seem to be going according to the much-revised schedule!