These smooth round glass beads can be used on paintings, mixed media or collage. For best results mix with Gel Medium MM4, or MM7 Gloss Varnish and Gloss Medium to maintain brightness. They can also be dropped into medium painted onto the surface. Because they are absolutely smooth it is suggested that art works using these glass beads are varnished with either MM7 Gloss Varnish and Gloss Medium, or MM14 Gloss (Turps-based) to securely seal the beads to the support.