This high quality Masking Fluid from Schmincke can be used for covering specific areas that you would like to remain white in finished watercolour paintings. It can be applied, left to try and acts to protect the paper in applying watercolour washes and strokes. After the painting has dried simply peel away to reveal the existing paper surface. For best practice, wash brushes immediately after use. UK shipping by road only. Not available for International or Northern Ireland delivery.