750-450-004 Rockhard Two Pack Clear Epoxy Gloss Rockhard two pack epoxy clear gloss is for use where the use of a stoving coating is not possible or desirable. This coating can be used on a wide variety of substrates including, metals, wood, asbestos, many synthetic rubbers and plastic. 750-450-004 is used as the touch-up coating for 576-450-002 Rockhard Epoxy Stoving clear coat.