On some of these surfaces it is recommended a basecoat of the Polyurethane Primer (62.601) for best results. Premium colours are flexible and exceptionally durable and permit prolonged exposure to weather without fading or losing their brilliance.Premium colours have been formulated with micronized, permanent pigments and an extremely resistant, exterior grade hybrid resin-polyurethane base, which withstands impacts, resists chipping and cracking, as well as direct exposure to heat and outdoor elements without cracking or fading, and is fuel residue proof up to a least 35% Nitro.AV Premium colours have superior flow, they are self-levelling and brush on with exceptional ease. For airbrushing, the colours can be used directly from the bottle when using a nozzle size 0,3. For the metallic colours some dilution might be necessary, and for smaller nozzles (O.2mm or less) the use of the Reducer (62.068) may be required. The recommended compressor setting is 30-60psi (2-4 bar).The range consists of 20 bright opaque colours, 23 dazzling metallics and fluorescents, and 9 shimmering transparent Candy Colours. All colours are as suitable for detail work as for covering large surfaces and can be applied by brush as well as by airbrush.The range is complete with 8 auxiliary products including the Transparent Basecoat and the Reducer, Primer, Varnishes and Drying Retarder. For an automotive refinishing and as an extra protective final coating, we recommend a catalyzed urethane clear varnish (spray can or airbrush).