Just had the plaster chipped off to a metre high and then the wall covered in a sulphur based cement render, then skimmed with plaster, i also had a damp course injected into the bricks at the same time, due to a damp problem. This work was carried out a week ago today, some areas of the plaster are still wet although it appears to be drying very slowly, also it seems as if salts are comming through the plaster around the area where its dried and where it`s still slightly wet, is this normal with this type of procedure?