ZINGA can be overcoated, but is -like any Zinc rich coating- sensitive to solvents. Therefore compatibility must be ensured. In general, fast-curing low solvent containing topcoats perform better. To test, apply a small amount of topcoat on a non-critical, non-visible part of the structure which has been coated with ZINGA and observe if any reaction occurs. To avoid any problems, we advise the use of a sealer (see: sealers on ZINGA).