Preparation
Mix the PVA with water,, this seals the wall stopping any suction that will dry out the plaster too quickly making it difficult to work with. Adding the PVA is essential I found it impossible to skim with out it. I coated the wall twice. 5 parts water to 1 part PVA for the initial coat, let that dry overnight, then 3 parts water to 1 part PVA just before starting to put the first coat on
Preparation
Mix the PVA with water,, this seals the wall stopping any suction that will dry out the plaster too quickly making it difficult to work with. Adding the PVA is essential I found it impossible to skim with out it. I coated the wall twice. 5 parts water to 1 part PVA for the initial coat, let that dry overnight, then 3 parts water to 1 part PVA just before starting to put the first coat on