Sanding smooth gypsum plaster

[lizziecupcakes]

Hi all
We are now beginning the decorating phase of our bedroom.

The ceiling has been plasterboarded and has gypsum skim.

The walls are original lime plastered, good condition except some bits cane off with the old wallpaper which I will patch up with some polyfilla.

Just wondering if I should clean the like plaster walls before adding lining paper to paint on.

If so, how do I clean the walls?

Also, how do I sand down the gypsum skim on the ceiling? There’s a couple of small spots where it’s not 100% smooth. I don’t know what kind of sander to use.

I’m also hoping to use the sander in another room where we had a patchwork of gypsum plaster done. I wanted to blend it better into the rest of the wall.

Any recommendation would be so helpful. Thank you

 

[CliffordPope]

I've always just used a bit of sandpaper wrapped on a rubber sanding block. It's hard work, but not as hard as holding a sander upside down for ages.

I don't think you need to clean the walls - just sand smooth the bits you've patched up and give the whole surface a light sanding to clear off any remaing fibres of old wall paper.

 

[Lacan07]

Hi all
We are now beginning the decorating phase of our bedroom.

The ceiling has been plasterboarded and has gypsum skim.

The walls are original lime plastered, good condition except some bits cane off with the old wallpaper which I will patch up with some polyfilla.

Just wondering if I should clean the like plaster walls before adding lining paper to paint on.

If so, how do I clean the walls?

Also, how do I sand down the gypsum skim on the ceiling? There’s a couple of small spots where it’s not 100% smooth. I don’t know what kind of sander to use.

I’m also hoping to use the sander in another room where we had a patchwork of gypsum plaster done. I wanted to blend it better into the rest of the wall.

Any recommendation would be so helpful. Thank you

With regard to sanding I got one of these.

There is a type of mesh structured sanding paper thats devoted to gypsum plaster. Get the finer grade, it works really well.

 

[a twig]

I’d go beyond @Lacan07 ’s recommendation and get one like this which has the ability to be hooked up to a vacuum for dust extraction plus it comes with the sandpaper type that he was mentioning. It’s unlikely the dust collection will fit directly to something like a Henry Hoover, duct tape may be required

 

[stuart45]

You can also use a pole sander for ceilings. For repairs on gypsum walls and ceilings I normally go over the area with Knauf fill and finish with a few coats. It can even finished with a sponge float if you want to totally avoid dust.