They are alkyd epoxy powder coated or polyurethane coated.Metrit ps selectively removes paints from various substates like metal or wood without attacking the base.Paint remover metrite-ps is a solvent based mixture of penetrantes and emulsifiers that accelarates the paint removing process at room temperature.By simply immersing the substrate in metrite-ps ready to use solution within 2 to 5 minutes the coating starts to blister off.Removal of paint by metrite-ps is much simpler than sandblasting.