Paint Defects Solution Guide

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DuPont Refinish

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Flawless paintwork is always the result of craftsmanship and years of experience.

Despite proceeding with the greatest care, things can still go wrong. The information contained in this Paint Defects Solution Guide is meant to help you recognize particular paint problems as well as their causes and how to avoid them.

Adhesion Loss, Clearcoat

Loss of adhesion of the clearcoat from the basecoat.

Adhesion Loss, Plastic Parts

Loss of adhesion of the refinish system from a flexible plastic substrate.

Adhesion Loss, Polyesters

Loss of adhesion between the polyester filler and the substrate.

Bleeding

Original finish color or peroxide hardener from polyester body filler seeping through the topcoat, causing a discoloration of the new finish.

Blistering

Bubbles or pimples appearing in the topcoat application.

Chipping

Small chips of a finish losing adhesion from the substrate - usually caused by impact of stones or hard objects against the vehicle's finish.

Clearcoat Yellowing

Discoloration causing the appearance of a color mismatch to the adjacent panel after the clearcoat is applied.

Color Mismatch

The color of the repaired part differs from that originally on the object being painted.

Corrosion

Surface of metal substrate is visible and shows corrosion spots.

Cracking

A series of deep cracks resembling mud cracks in a dry pond. Often in the form of three-legged stars and in no definite pattern.

Dirt Inclusions

A surface with this defect will show particles of different sizes and origin, deposited in the undercoat or topcoat.

Dissolution

Metallic particles from the basecoat surface in the clearcoat. If severe, the effect can alter the tone and exagerate the metallic appearance.

Dry Spray

Granular texture normally with no gloss at all.

Edge Mapping, Shrinkage

The edges of the repair area where the original finish was cut through show after topcoat application due to shrinkage of one or more layers of the system.

Edge Mapping, Solvent Penetration

Enlarged sandscratches caused by swelling action of topcoat solvents, appearing at the area of the repair where it was sanded through to the substrate.

Environmental Contamination

Discolored spots and/or etching marks visible in the topcoat, commonly caused by acid rain or bird droppings.

Fish Eyes

Small, crater-like opening in the finish after it has been applied.

Hiding

When the filler, primer or sealer on the repair area is visible through the topcoat.

Lifting

Surface distortion or shriveling, while the topcoat is being applied or while drying.

Matting

Loss of initial gun gloss after finish has dried.

Mottling

Occurs mainly in metallics, when the flakes float together to form a spotty or striped appearance.

Orange Peel

Uneven surface formation - much like that of the skin of an orange. Paint droplets dry before they can flow out and level smoothly together.

Peeling

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

Pinholing

Tiny holes or groups of holes in the finish, or in putty or primer, the result of trapped solvents, air or moisture or improper surface preparation.

Polishing Marks

Marks or cut-throughs to the topcoat surface resulting from compounding and/or polishing.

Runs

Heavy application of sprayed material that fails to adhere uniformly to the surface.

Slow Drying

Paint takes a longer time to set up or dry than detailed in the Technical Data Sheet.

Solvent Pop

Blisters on the paint surface caused by trapped solvents in the topcoats or primer-surfacer.

Water Spotting

General dulling of gloss in spots or masses of spots.

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