Advice on old plaster stain

D Griffiths

New Member
Hi, couple of years ago I had an old combi boiler removed from the corner of an upstairs room, stripped the wallpaper and the plaster below was darker
Advice on old plaster stain
Advice on old plaster stain
Advice on old plaster stain
Advice on old plaster stain
to rest of the room. Since been skimmed and painted but the difference is still showing through. Can anyone advise on this and what the solution could be? Thanks
 
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