Bathroom walls have a lot of hair spray marks on the wall. They will not wash off. What do I do before I repaint the walls? thanks
Hair spray is generally a type of varnish and as such will leave a residue.
If you clean the walls prior to repainting, you should not have a problem painted over the residue. If the residue is brown and not just slightly visible, I would recommend an acrylic stain sealer/primer for the affected wall.