I have a friend over from Australia, who is renovating his 1850's house. The walls are brick which he gives a scratch coat of Lime/sand mortar; a level coat of lime/sand, and a final skim of mixed lime putty 50% and "hardwall plaster" 50% (there is not much variety of plasters available over there as this is not a common finish).
He finds the skim finish sets in about 10 mins from mixing, and asks if there is a way of retarding the set. The temperature (South Coast) in not high, about 15-20C
He finds the skim finish sets in about 10 mins from mixing, and asks if there is a way of retarding the set. The temperature (South Coast) in not high, about 15-20C