Instructions. Clean the surface from dirt, dust and grease by means of acetone, because these substances could avoid the adhesion of the coating. If old coatings peeled off, sand with 150-180 grit sandpaper. Spread the product on the surface. After 2 hours it is possible to apply a second coat. To decorate rusty metal surfaces, remove the rust with sandpaper or metallic brush. Apply an antirust, then apply Vintage Prestige products. RBxx90 can be diluted up to 10% for brush application and up to 15-20% for spray application.