PITT-TECH Plus Interior/Exterior High Gloss DTM Industrial Enamel Pitt-Tech Plus Semi-Gloss Industrial Enamels are a full line of 100% Acrylic waterborne enamels designed for direct-to-metal application. These products provide corrosion protection, chemical and solvent resistance, and are fast drying with low odor. Recommended for use on properly prepared interior or exterior metal, masonry, plaster, and drywall surfaces.