I am attempting to paint a tuff wall using a latex paint.
It's actually a repaint, so I stripped the old (water based, possibly whitewash) paint using steam and a scraper, allowed the wall to dry and then sanded it with 120 grit sandpaper where it felt rough, then I applied an acrylic primer and a water based (latex/acrylic) paint. The results? Frustrating!
As you can see there's litterally voids in the paint, as if it never touched the wall, or the wall itself had holes or cracks! This happens both with a paintbrush and with a roller, both on smooth primed and smooth non primed walls.
The primer is an OK one, the paint is too, but pretty thick and used following the manufacturer's instructions, thinning it doesn't help either.
What could I possibly be doing wrong? This doesn't happen on pine and MDF boards, so there must be something wrong with me, the paint or the wall... the paint I stripped was brushed, I could see brush marks but no holes.