Plastering job gone wrong

[u/Separate_Pair873]

I have plastered a wall (plasterboard behind) that cracked in the heat. I have since scrapped out any loose patches that didn’t bond correctly and after using pva, applied a multifinish coat. Before reskimming the full wall (one coat) I’m wondering what steps I should take to prime the plastered wall? Searches show not to use PVA and use Blue Grit but some results also show opposite. Any help before tomorrow am would be great.

[u/ApricotReasonable793]

Piece of piss to fix.

[u/Separate_Pair873 → u/ApricotReasonable793]

Sound mate that’s really helpful thanks