Painting new plaster

[JamesAsus]

I have filled in a couple of small holes on one of my walls using no nonsense multi purpose filler and in another room i have fixed a large hole in my plasterboard with a new patch of plaster, scrim tape and jointing compound.

In the past when ive painted over new plaster it has flashed through and looked darker than the surrounding paint, whats the best option to prevent this? Put primer on the new patch prior to painting? If so what primer.

 

[JamesAsus]

also ive noticed small air pockets in a lot of the joint compound, they were bubbled up/raised but now ive sanded its left lots of little tiny air craters in it??

Its not over the joint itself but towards the edges to the existing plaster?

 

[chappers]

Just refill with a bit more jointing compound and sand again, if the repair is definitely flat and with the rest of the wall and not itself slightly different to the rest, for example in texture, then more coats of paint should cover it. assuming the repair is perfectly dry

 

[JamesAsus]

Just refill with a bit more jointing compound and sand again, if the repair is definitely flat and with the rest of the wall and not itself slightly different to the rest, for example in texture, then more coats of paint should cover it. assuming the repair is perfectly dry

Well it is flat and blended into the edges but its obviously raised slightly because of the joints

 

[JamesAsus]

How do you actually get it as flat as the rest of the plasterboard? Given that theres skrim tapes over the joints and you need to hide that tape its always going to be more raised than the rest of the wall? And as a result surely it will always be noticeable, especially with silk paints?

 

[roy c]

Well dont wear silk pants!!!

 

[chappers]

How do you actually get it as flat as the rest of the plasterboard? Given that theres skrim tapes over the joints and you need to hide that tape its always going to be more raised than the rest of the wall? And as a result surely it will always be noticeable, especially with silk paints?

then you need to feather the jointing compound back into the board over a larger area and sand flat

 

[JamesAsus]

How do you actually get it as flat as the rest of the plasterboard? Given that theres skrim tapes over the joints and you need to hide that tape its always going to be more raised than the rest of the wall? And as a result surely it will always be noticeable, especially with silk paints?

then you need to feather the jointing compound back into the board over a larger area and sand flat

It is feathered in i.e. you cant see it go from the plasterboard to the joint compound but running your hand over the joints it does feel raised but doesent look it, will this always be the case and if i put primer over it then paint it should be ok as long as i use a matt paint?

 

[chappers]

The only way to tell if you have faded it sufficiently into the wall is to give it a couple of coats of paint, you can always go over it again with jointing compound if you need too. You would have a better chance of it not being noticed with matt rather than silk which is notorious for showing up imperfections, also it doesn't touch up very well.

 

[JamesAsus]

Should i use primer over the whole area? Part of the new patch of plasterboard is exposed in the centre and the surface has been sanded a bit so dont know if it will absorb standard emulsions well?

 

[chappers]

shouldn't need priming, if you have scuffed the paper on the board then give it a thin skim of jointing compound and sand back