Mud Cracking

Deep, irregular cracks resembling dried mud in dry paint film.


Possible Cause :

• Paint is applied too thickly, usually over a porous surface.
• Paint is applied too thickly, to improve in herent poor hiding ( coverage ) of a lower quality paint.
• Paints is allowed to build up in corners upon application

Solution :

• Remove coating by scraping and sanding.
• Prime and repaint, using a top quality latex paint.
• Mud-cracking areas can also be repaired by sanding the surface smooth before repainting with a top quality latex paint, this type of paint is likely to prevent recurrence of mud cracking, because it is relatively more flexible than alkyd paint, oil based paint and ordinary latex paint.
• Quality paints have a higher solids content, which reduces the tendency to mud crack. They also have very good application and hiding properties, which minimize the tendency to apply too thick a coat of paint.
  

Picture Framing

An effect of non-uniform color that appear when a wall is painted with a roller, but is brushed at the corners. The brushed areas generally appear darker, resembling the " frame " of a " picture ". Also, sprayed areas may be darker than neighboring sections that are brushed or rolled. Picture framing can also refer to sheen effects.

Possible Cause :

• Usually a hidding (coverage) effect. Brushing will generally result in lower spread rates than rolling, producing a thicker film and more hiding.
• Adding colorant to a non-tintable paint or using the wrong type or level of colorant.

Solution :

• Make sure that spread rates with brushes and rollers are similiar.
  
• Don't cut in the entire room before roller coating.
• Work in smaller sections of the room to maintain a " wet edge. "
• With tinted paint, be sure the correct colorant-base combinations are used.
• Factory colors, as well as in-store tints, should be thoroughly shaken at time of sale.