Peeling

Also known as:
loss of adhesion, shelling, poor bond, de lamination, flaking, poor adhesion

Description:
 Loss of adhesion between paint and substrate - topcoat to primer and/or old finish, or primer to substrate.

Origin and Potential Causes:

· Improper cleaning or preparation. Failure to remove sanding dust     and other surface contaminants will stop the finish coat from          coming into proper contact with the substrate.
· Improper metal treatment. Metal conditioner and/or wash primer       was not used.
· Use of incompatible material for substrate.
· Materials not uniformly mixed.
· Failure to use proper sealer.
· Paint film too thick.
· Dry application.
· Film was too dry when the masking tape was removed.
· Flash times too short.
· Poor sanding of substrate or undercoats.
· Too low/too high surface temperature when applying refinish            system.
· Condensation on substrate due to temperature changes.

Prevention Techniques:

· Use appropriate grits of sanding material for the system you
· Seal to eliminate sand scratch swelling. Select thinner or reducer     suitable for existing shop conditions.
· Use proper thinner and reducer for primer- surfacer.
· Do not apply coats of primer too heavily.
· Use compatible paint systems.
· Degrease and prepare substrate carefully.
· Follow application recommendations per Technical Data Sheets.

Remedy:

 Remove finish from an area slightly larger than the affected area and refinish.

Detailed Image Peeling

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