Paint cracking on new(ish) plaster - advice to recover gratefully received!

[Shrimper_]

I have recently had a plaster repair job completed, and having left it to dry out for a few weeks, applied some Farrow and Ball paint to the surface.
Two coats in with a roller and the paint appears to have cracked as it has dried, flaking away from the wall surface.
This is only in a couple of small patches, not the whole area.

I anticipated that newer surface might soak in more of the paint - but what is the advice to get an even finish across this surface now I've taken it to this point?


Thanks in advance for the experience and expertise

 

[sparkwright]

Can't pinpoint the exact cause yet, but here are some ideas:
1) New bare plaster wasn't given a mist coat before neat emulsion was applied?
2) There were some PVA splashes on the plaster surface?
3) The surface was dusty or greasy?

Farrow and Ball emulsion has a bad name at the moment, as it seems to peeling off easily, but that may be unrelated to your problem.

 

[Wayners]

Did the instruction required F&B paint to have a primer?
Some skip this and get trouble. Look up the application pdf data sheet or read back of tin

 

[Shrimper_]

Thanks! No - specifically no primer needed. I patch-tested a small area successfully, and then on that basis ploughed straight in with the roller on the whole area.
I gave the newly plastered area a light sand and then washed it.
It appears to just be a couple of small patches - so my proposed solution is probably sand back, mist-coat and repaint?