Would YOU have primed this wall?

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Please see below for pics of the horrible blue wall in my bathroom. The white patches are Polyfilla which I have sanded down. The blue paint has also been sanded down severely. The pink and brown patches are where the sanding went trough the top layers of paint and ended up exposing another layer of horrible pink paint below the blue one and in some places I got trough to bare plaster.

I intend to paint my bathroom with Dulux trade Diamond Matt (pure brilliant white).

Question is as follows:
Would you have primed this wall?


Seeing as I have sanded it for several hours any potential flakiness and fungus is definitely removed, so what remains is the possibility of a chemical reaction. I have no way of knowing what the current blue paint is, but it looks a bit shiny (silky?) and was damn tough to sand down.

My initial plan was adding a first layer of heavily diluted Diamond Matt, then see what happens. If OK I will do to more coatings. Sounds OK?



Disclaimer. I have NO idea why these pictures are upside down. I uploaded them the right way. Have given up trying to fix it....
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You say this is the bathroom, have no idea how you keep the water in the basin, :LOL: but this is most likely just to have been a blue paint of either vinyl silk or if the property was old enough, then good old oil eggshell, or even gloss. The colour choice of blue gives it away !! Very doubtful that it would be modern kitchen/bathroom paint.

As you seem to have no problems, other than sanded the hell out of everything to get a nice flat surface, why not just pop along to your local dulux centre and get yourself a 10ltr of Glidden Trade 'Contract' matt, cost you around £18 to £20 quid. ( Non-Vinyl) Give the walls a sightly thinned 10%, 2 coats of paint letting it dry in between. That should give you a base coat layer to see that all is ok before moving on to 2 coats of the diamond finish.
 
Using contract matt, is that to save money? Or is there another reason?

I only need to paint 9 m2 so I think the Dulux Diamond Matt tub I have already bought should suffice, if I consider one skim coat and two proper coats.
 
No, it was not to save money.

The Glidden trade Contract matt, is a non-vinyl paint and using it allows you to give the walls a good base coat and check that all your prep work is ok before applying your top coats, which as you say is Diamond matt.

The Diamond matt has a vinyl content and any further repairs to the paint surface between coats of vinyl paint are quite difficult to hide and can show through again to the finished surface.

It is only my method.
 
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I too prefer to use a thinned non vinyl matt but tend to use dulux supermatt. As oldgreymouse states its comes down to individual preferred methods. There is no reason why you cant just use the diamond matt in the same way in your situation though. Meaning that you don't have to buy any more paint.

Good luck :D
 

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