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Origin and Potential Causes:
The surface of the metal was contaminated (fingermarks , water ) before application. Paint removed by chipping, scratches, etc. Inadequate pre- treatment of the metal surfaces. Rust was not completely removed before refinishing. Destruction of paint film by contamination.
Prevention Techniques:
Treat metals with correct metal treatment and wash-primers. Repair all chips and scratches before rust develops. Clean the vehicle thoroughly before applying refinish system. Residue of water from sanding still on the surface should be wiped off and allowed to completely dry before applying refinish system.
Remedy:
Paint has to be stripped/sanded back to the bare metal.Use the metal conditioner and a phosphoric acid wash primer (etch-primer) applicable for the substrate. Refinish
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