Duncan's Luster Essence is a must to thin all of Duncan's lusters and clean your tools & brushes. Other cleaning agents may contain water or solvents which will cause separation of the overglaze during subsequent applications.
How to Use Essence: Swish overglaze brush in solvent until bristles are free of product.
Tips & Techniques for Essence:
Use a separate bottle of Essence for each overglaze product. Mark the bottles according to which overglaze product was used. Contamination can result if brushes and/or Essence used with one product come in contact with brushes and/or Essence used with another. For example, if you use Bright Gold and clean your brush in one bottle of Essence, then clean a brush used with Mother of Pearl in that same bottle of Essence, contamination will result and compromise all subsequent firings.