Clay paint is suitable for many interior surfaces, especially absorbent natural materials. Suitable substrates include, for example, plastered walls, tensioned cardboard, rag paper, untreated wood, fiberboard, brick and masonry blocks, as well as surfaces previously painted with clay paint.
Painting over plasterboard, old wallpaper, and many previously painted surfaces is also possible. However, their surface preparation and adhesion must be assessed on a case-by-case basis. You will find more detailed instructions for preparing plasterboard and painting over wallpaper below.