I've followed the thread on the B&Q PVA disaster with personal interest. I'm redecorating several rooms, which involve Expamet corner and stop bead and 'feathered' skim-coats, as existing corners were 1" wooden dowel from the 1920's. I've used a glue product called 'Sticks Like Sh*t' to secure the Expamet beading, so far quite successfully.
Now, I have a chimney breast where the L&R sides have been skimmed flat and smooth, and the plaster has been carried round onto the front face as a 9" wide feathered surface, onto the existing mainly sound plaster
- which was painted. Some of this paint was loose, and I've used 2" parcel tape to pull off the loose stuff. So, there are 3 'problem' surfaces on the one chimney breast - old bare plaster, paint over old plaster, and gypsum skim-coat over paint over old plaster.
When I run my hand over this old plaster surface, I get a little plaster dust. When I run my hand over the new 'feathered' surface, I get a *lot more* plaster dust...
I've now fitted stop bead around the fireplace opening, and I have it in mind to apply a Polycell/Polyfilla Finish Skim product as a skim-coat - which will bring the surface out 2-3mm to the edges of this new stop bead around the opening, and improve some roughnesses higher up.
However, I want an adequate paint adherance afterwards.
My local Crown Trade store recommends shellac-based 'Zinsser Primer Sealer', then Crown Matt Vinyl emulsion.
Has anyone on the forum any relevant experience, recommendations, or horror stories to tell?