Blistering
The formation of local concentrations of moisture under the applied coating that is revealed as a form of fine bubbles on the surface of the top coating.
| Causes | Prevention |
|---|---|
| insufficiently cleaned surface, | thoroughly clean the surface before applying coat, |
| wet sanding of polyester materials, | polyester materials should be dry sanded only, |
| water in the installation of compressed air, | apply appropriate filters to stop moisture in the compressed air installation, |
| too thin coat thickness leading to increased permeability of moisture. | observe recommended thickness of coating. |
Repair
- Sand and apply coat again.
