Hyundai WHC, Porcelain White, Tri-Coat. Paint Code WHC, Porcelain White, Tri-Coat for Hyundai. WHC, Porcelain White, Tri-Coat for Hyundai is formulated using R&E Low VOC Urethane Basecoat paint. The R&E Low VOC Urethane Basecoat paint exhibits exceptional color accuracy and excellent coverage and is specifically designed for all Automotive Refinish Applications.