If the primer surfacer is applied too heavily near the masking edge, it can lead to uneven surfaces. This buildup may create an abrupt transition between the primed and non-primed areas, affecting the final finish.
The masking edge itself might become more visible if primer surfacer is applied up to it. This can occur if the primer doesn't adhere well to the masking material or if there's an uneven application.
The primer surfacer might interfere with the adhesion of subsequent layers, such as basecoat or clearcoat. This can lead to peeling or flaking of the paint in the affected areas.
Depending on the color and texture of the primer, applying it up to the masking edge may result in variations in color or texture compared to the adjacent, non-primed areas.
What could be caused by applying a primer surfacer up to the masking edge?