Hello!
See pictures of the render.

We have been advised to use matte linseed oil paint on our wood stove, which is now rendered with Weber's combined plaster and mortar.

The texture is quite rough.

If we touch the render, it tends to shed a few grains of sand.
Question: do we need to brush away the excess before painting, or will the paint bind these grains of sand?
 
  • Rough textured plaster surface on a wall, likely coated with Weber's combined rendering and mortar, showing uneven granules and a coarse finish.
  • Close-up of rough plastered surface, showing texture of Weber's combined plaster and mortar, with someone slightly visible in the background.
  • Close-up of rough plaster applied next to exposed brickwork on a wall.
  • Rough textured plaster surface with visible grains, suggesting a recent application with a potential need for additional smoothing or cleaning before painting.
I suspect you're talking about linus wall paint from Allbäck? It's a matte chalk and linseed-based paint that gives very good results on plastered surfaces. I've used it myself in similar circumstances where I plastered with c-bruk. I just brushed down the loose parts and painted over, turned out very well.
 
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