Here a MDF bath panel is painted using Zinsser B.I.N and Zinsser perma-white, this will ensure that the eggshell topcoat is applied to the correct primer. Once painted this bath panel will last for years and can easily be wiped clean with a damp cloth. Bare MDF can be painted in exactly the same way, by first sealing it with Zinsser B.I.N and then applying a top coat.