Cause

Caused by the application of a pigmented matt emulsion over a surface previously finished with a vinyl silk emulsion. This is where the adhesion of the most recently applied coating is poor and the underlying material offers no keying properties  for when the last coat of paint is applied.

Remedy

Rub down with a “Scotch Brite” pad and apply a thinned-down coat of good quality vinyl matt emulsion. If this fails to cure the problem then an acrylic primer should be tried. It may be necessary to reinstate with a vinyl silk or satin emulsion.

 Mud Cracking

Cause

Caused by the application of a matt emulsion over a surface previously finished with a vinyl silk emulsion. This is where the adhesion of the most recently applied coating is poor with the underlying silk finished material offering no keying properties for the newly applied matt finish.

Remedy

Rub down with suitable abrasive paper and  to a trial area apply a coat of good quality vinyl matt emulsion, thinned a necessary. If this fails to cure the problem, then an acrylic primer should be tried. It may be necessary to reinstate with an emulsion or acrylic with a higher sheen finish.

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