In article ,
deano writes:
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?

Ordinary PVA softens with long exposure to water.

--
Andrew Gabriel
[email address is not usable -- followup in the newsgroup]