Scarlet Brush. These Synthelux Spalter Brushes are from an Italian fabricator and are made of very high-quality fine synthetic bristles. These Spalter Brushes are an excellent choice for the application of fine finishes – the silky synthetic bristles provide a smooth, even finish, with minimal brush strokes. This is one of the most commonly used brushes in faux finishing and is particularly well-suited for softening glazes and stains, as well as creating subtle strié effects.