Problem Solving Guide

PROBLEM APPEARANCE
Adhesion Loss

Coating peeling from substrate or the previous coat

Bleeding

Coating discoloured

Blooming

Cloudy haze on top of the coating

Blushing

Cloudy haze in the coating

Brittleness (linked with lack of adhesion)

Coating chipping or cracking from substrate or previous coat

Bubbling (also called solvent boil or aeration)

Bubbles in the coating

Champagning

Coating efforvessing like champagne

Cissing (also called cratering or fish eyes)

Coating drawing away in circular fashion from the substrate

Cob-Webbing

White “cob-web” trails being sprayed from the gun

Cracking or Crazing

Coating or substrate cracking or crazing

Dirty or seedy finish

Dirt, dust or overspray in the coating

Discolouration

Substrate or clear coating changing colour

Fat Edge

Ridge of accumulated coating on the edge of the substrate

Flotation

Separation of the pigment in the dry or liquid coating

Flow

Uneven appearance when dry

Frying

The dry surface of the coating pulls back resulting in raised ridges that can be seen and felt

Marring of Film

Coating film easily marked

Opacity (poor)

Substrate or previous coats showing through the last coat

Orange Peel

Uneven finish that resembles the skin of an orange

Overspray (also called dry spray)

Dry paint particles that have been sprayed and not formed a smooth film, resulting in a rough sandy feel and appearance

Patchy Colours

Blotchy and uneven stains

Patchy Gloss Levels

High and low gloss spots in the dried coating

Pinholing

Small pinholes visible in the dry coating

Premature degradation of the coating system

Coating cracking, lifting, delaminating etc

Printing

Defects in the film after transporting

Sagging (or runs)

Coating moves and runs on vertical surfaces

Settling

Separation of coating in the can or pail

Sink Back

Noticeable defects in the dry film

Slow Drying

Coating tacky or wet after the recommended drying time has elapsed

Streaking (in pigmented finishes)

Lines of differing colours in the dried coating

Streaking (in metallic or textured finishes)

Lines of metallic or textured streaks in the dried coating

Thickening (also called bodying)

Coating becomes thicker in the can over time