corablimey
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Thats the downside of plastered walls, they look lovely in the natural light, but get the artificial light on them and it shows every nic and indent.
you can either paint them with a white quite thin miscoat, or if you have a lot of the colour specially if its quite light you can use that, this will show up every nic etc, give the walls a light sand down before you do this, as you will have loads of nibs on the plaster.
After you have miscoated and you fill all the nics and indents, rub them down, and then whack some paint on the filled areas with a brush at least 2-3 times, then do your normal coats.
This is called 'spotting the filler' and what happens is if you dont spot and just roll as normal, then the white filled areas will 'flash' show thru the paint, I never have this as I always spot at least 3 times.
In between coats again give a light sand down with either a worn bit of sandpaper, or very fine, and carry on with your coats.
I have said this on other threads, but when you do your final coat, cut in and roll one wall at a time, you get a far better finish.
Also, Use a good quality Matt paint, dont use silk, or soft sheen, its sort of okay for skimmed plaster, but silk and soft sheen isnt very kind to the walls, it tends to empathise and lumps and bumps in the walls.
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