Always test your material for suitability before using Simply Spray or Upholstery Spray as the material must be moisture-absorbent. New garments and fabrics should be pre-washed before testing to remove water-resistant manufacturing residue. To test your material, spray with a little water and if it absorbs readily, the paint will too. If the water forms into beads on the surface, and fails to soak in even after a little rubbing, the paint will not absorb either. Suitable materials can include cottons and blended fabrics, canvas, velours, carpets, unfinished wood and leather. Stencil Spray is a different formula and can be used on almost any material as it does not need to absorb in order to dry.