Why certain colors, such as red, are more difficult to cover?
The difficulty to cover a previously painted surface is related not only with the color in the base but also with the darkness of the color to apply. The hiding problem when you apply a new paint is more evident when a very light, clear color (such as yellow) is applied on a very dark color (such as red). Multiple coats of paint are required in these cases. The use of a flat gray paint will help to cover and to accept better the clear color.
