Blistering paint mystery

[michealangelo]

Yes

Apply two coats of the alkali resisting primer

Thank you

It could be something as simple as a little bit of oil based paint was on a brush or got on a brush or roller somehow

This reacted to the plastervin just this tiny area and caused the recurring blistering or non adhesion etc

Or a spec of oil or grease got into the brush or roller used to initially cover the plaster ......and bingo .....there is the reaction

Sealing this area an inch or so around the patch with two coats of the alkali primer ....allow full drying between coats .....then repaint

 

[Michael Rosen]

Thank you that's really helpful