dry plaster

I decided to skim one wall of my bedroom which had some new wall lights and sockets moved around. I PVA'd and bonded the chased walls first then applied PVA to the entire wall and skim coated it with Thistle Multi finish once the PVA was tacky. I have attached before and after pictures (don't...

I decided to skim one wall in my bedroom as new electrics were being put in. I've put a before and after picture, my question is why is half the room still dark after 2 weeks? I bonded the chased parts out, PVA'd the entire wall and then used Thistle multi finish once the PVA was tacky. Is there...