by theshedman »
Tue Feb 15, 2011 10:18 am
Hi, not got a lot of time at present but that rubbery coat you are talking about sounds like it could be a waterproof membrane which is often painted on. Usually this is put on to stop some form of damp. There is not usually a lot of dust with bare plaster but damp may have done something to it which is making it powdery. I would get someone to check it out first then if they don't find anything then strip the wall. You could try a steam stripper or paint stripper making sure you have plenty of ventilation for both. For the ceiling I would give it a good rub down for the new paint to key to it, then give it a good wash with some sugar soap before giving it 2 or 3 coats of Dulux bathroom and kitchen emulsion.