Sometimes underwear is critical
white or blue over white, then black, then gray and you’ll have
three different looking samples, with gray being the trueat representation of your original color. Sometimes you also need an undercoat that really grabs the surface. All In One is the perfect primer for
this. I love to use it when painting items that have combination surfaces, like part wood and part vinyl
coated mdf or chipboard (commercial and builder grade vanities are often a combo of these. The primer unifies the surfaces so that the paint glides over it all smoothly behaving as though it was all the same exact surface.