Shiny patches after filling, sanding & repainting!

[Mike2012]

Hello fellow DIYers

I've been repairing knocks and scratches on painted plastered walls by filling, sanding down then repainting with matt paint.

It looks fine when facing the repairs but when the light catches the walls or ceiling at an angle I can clearly see the patches where the repairs have been done.

How can you get a matching even finish with these repairs?

Many thanks
Mike

 

[TheVictorian]

Are you painting with a roller or a brush?

Use a medium pile roller over the whole wall and it will cover it all.

 

[Mike2012]

Thanks for the reply TheVictorian.

I think I used a small foam roller, I will try a medium pile roller instead. However I'd rather not repaint the whole wall if possible but will see if I need to.

Thought it might have been because I was using the wrong type of filler or sanding too hard?!

cheers

 

[ajsdoc]

Are you just painting the repaired area?

 

[dcdec]

Its got nothing to do with the roller (although a foam roller on walls is a strange choice). Filler needs to be spot primed to prevent it flashing through the top coat. Water down some matt emulsion by 20-30% and prime the filler.

Filler is more porous than the wall around it so it draws more water out of the paint thus it flashes. Smooth walls - short pile sleeve and if they're a bit lumpy and bumpy then use a medium, its not neccessarily wrong to use a medium on smooth walls but its nice to leave as little pattern from the sleeve as possible on the wall. Wooster pro-dooz are superb.

 

[Mike2012]

ajsdoc - yes I'm just painting the repaired areas.

dcdec - ok thanks. I chose the foam roller since for some reason I thought it would be quicker to clean than the normal one! (so what are foam rollers best for by the way?) Thanks for the Wooster pro-dooz recommendation.

I hadn't spot primed the filled in areas so will do that with the next room. For the room I've done already I will try a short (or medium if required) pile roller instead.

cheers

 

[joe-90]

Foam rollers are for oil paints.