Here's the lowdown...
I rendered my garden wall to a smooth finish, then PVA'd it, then painted it with Leyland exterior masonary paint. The big mistake was PVAing it! Not allowing the wall to breathe through the paint layer and dry out after a wet spell. The result... large clusters of bubbling as parts of the PVA coating has laminated away from the render. The problem... getting the whole wall stripped, including areas where bubbling hasn't occurred and the paint layer is stuck fast to the render... I have tried scraping and sanding and even a blowtorch! Next step jet wash?
I'm worried that if I don't get it all off it will continue to blister, even when I've repainted!
Any suggestions to me getting this all off? Some kind of PVA eating solvent?
Many thanks, dean.