WINSOR & NEWTON ARTISTS WATERCOLOUR MEDIUM- Permanent Masking Medium 75ml
WINSOR & NEWTON PERMANENT MASKING MEDIUM
A non-removable, water repellant liquid wax designed for masking specific areas of paper, making them resistant to water.
When dry, the medium will repel superimposed washes. Excellent for detail. Apply directly to the paper, or tint with small amounts of water colour.
Allow to dry completely before overpainting.