CAUSES: A rough, crinkled surface usually occurs when there is interference with the normal drying time of the paint. If the surface film dries before the bottom layer, the dry film will move and wrinkles will form.
Possible interference includes the following: application of a second coat before the first one is thoroughly dry; application of a hard finish over a softer coat without priming; painting in the hot sun or over too cold a surface; applying too much paint; or application over a glossy finish.
SOLUTIONS: First, the wrinkled layers must be removed. If the underneath layers are still soft, they can be removed by scraping alone; but if they are aged. You may need to use chemical paint removers.
Areas stripped to the bare wood should be primed and allowed to dry completely before the top coat is applied. To avoid wrinkling, brush out each coat thoroughly and allow it to dry completely. Don’t paint in direct hot sunlight or when the temperature is below 40 degrees F, or 50 degrees F is using latex.