4300 Series Pearlescent & Metallic Colors. Pearlescent and Metallic Colors are pearl base coats. For graphics and base coat application, they’re best applied as a mid-coat over a color-keyed AutoBorne Sealer base. Start with a color-keyed AutoBorne Sealer for best orientation. Auto Air Pearlescent & Metallic Colors lay down flat with an even pearlescent orientation when applied over a color-keyed base color as opposed to a white or black base. By color – keying with the base color, less material is required which reduces the build-up of pearlescent that creates a mottled, splotchy finish. Using minimal amounts of pearlescent is key to achieving an even pearlescent finish. It is also important to allow for adequate drying time in between coats of Pearlescent & Metallic Colors so that each coat lays down in an even pattern. If the underlying coat is still tacky, the next coat’s pearlescent will accumulate along the underlying coat’s pearlescent pattern and develop channels of pearl which will create a mottled appearance. Color-keying the Pearlescent Colors with the underlying base color saves not only material, but allows for quicker drying times due to less material per coat and an even orientation in the finish.