SHIMRIN Black Pearls (PBC) are universal base coats that may simply be cleared for a final finish, or used as a base coat for Kandys or Pearls. Due to their unique chemistry make-up, they may be top coated with either acrylic lacquer or urethane enamel. These Designer Pearls are usually applied over 8513ZP Shimrin Black BC-25. See the Materials Guide pgs. 67-68 of the Tech Guide or our website for required quantity.