We have had the wall plastered a few days ago and brown stains have appeared. We had previously cork tiles on the walls which have been skimmed. The plasterer had problems when applying the unibond and the plaster kept bubbling and then he used something i think it was called spa which he said would be more effective. I have bought sealant for the new plaster but understand that i might need to use microprous paint to allow the plaster to breath.How long do i wait and which do i apply first, the sealant or the microporous paint. As the plaster is drying some of it is leaving a salty,grainy substance on the walls with rust coloured staining coming through in some areas.
Can anyone help please. :?