hi,any tips on skimming onto old plasterwork?
i skim onto new plasterboard ok,looks good even when lighting shon onto it. But when i skim onto old plasterwork it seems to be flat and smooth but when its dried out and painted u can see impurfections. no trowel marks just wavey finish?
i give2 coats of pva 50/50 beforehand?
also 2 skim coats?
can i get away with one coat onto new plasterboard?