Haymes Artisan Collection Oxidising Patina is a specially formulated oxidant for use with the Artisan Collection Real Iron or Real Copper paints. The oxidant reacts with these paints to create a rusted iron finish or Copper Verdigris finish. Oxidising Patina is suitable for Interior & Exterior use. To seal and slow down the effect created by the oxidising patina, apply one coat of Artisan Collection Natural Clear Matte. Always refer to the product data sheet.