I spent 20 hours removing the wallpaper and glue with a mix of using dif, a steamer and water/vinegar. I've been palm sanding the walls smooth and washing as well.
Two walls are fine, the other 2 are lousy. The 2 lousy have:
- an outer layer of paint in some places
- another layer of paint beneath the outer layer or showing where the outer layer has come off
- a few patches down to drywall where both layers of paint striped. The drywall looks like cardboard
When washing, I see bits of the outer that bubble/flake, but not enough to get the outer completely off.
I'm afraid that whatever I paint will eventually bubble/flake as well. How can I prepare these walls adequately prior to painting?