Paint Booth Filters Now AvailableGet Your Quote
filters Issue

Coating Defects Guide

The master troubleshooting guide for paint booth finish quality problems. From minor imperfections to major defect outbreaks.

Emergency: (877) 489-3727Start Diagnosis

What You're Experiencing

Paint or coating finish is showing defects that affect appearance, durability, or customer acceptance.

Visual Signs:

  • Orange peel texture in finish
  • Fisheye craters in coating
  • Dust or debris in film
  • Runs or sags
  • Color variation or mottling
  • Adhesion failure (peeling, flaking)
  • Solvent pop or bubbles
  • Dry spray or overspray texture

Sound Signs:

  • Unusual spray gun sounds may indicate equipment issues

Safety Risks — Read Before Proceeding

medium(OSHA 1910.134)

Rework chemical exposure

Action: Rework increases solvent exposure. Ensure adequate ventilation and PPE.

high

Quality escapes to customers

Action: Defects reaching customers damage reputation. Implement QC holds until resolved.

Immediate Steps to Take

  1. 1

    Identify and document the specific defect type

  2. 2

    Determine if defect is consistent or random

  3. 3

    Check booth conditions: temp, humidity, airflow

  4. 4

    Review recent changes: paint batch, process, equipment

  5. 5

    Inspect spray equipment condition

  6. 6

    Check surface preparation process

  7. 7

    Test on sample panels to isolate cause

Common Causes

Here are the most likely reasons you're experiencing this problem, ranked by how often we see them.

Booth Environment

common

Temperature, humidity, airflow, or contamination in the booth affecting finish.

Application Issues

common

Spray technique, gun setup, or equipment problems causing defects.

Material Problems

occasional

Paint mixing, reduction, compatibility, or shelf life issues.

Surface Preparation

occasional

Inadequate cleaning, sanding, or priming before coating.

Contamination

occasional

Silicone, oil, water, or other contaminants on surface or in air.

Cure Issues

occasional

Temperature, time, or conditions during cure affecting final film.

Interactive Diagnostic Tool

Coating Defect Diagnostic

Step 1 of 5

Is the defect orange peel texture?

If unsafe at any point: For severe defect outbreak affecting production, call WERCS at (877) 489-3727 for rapid response.

When to Call WERCS

While some issues can be resolved with basic troubleshooting, these situations require professional service:

  • Cannot identify defect cause
  • Defects affecting multiple parts
  • Booth conditions suspect
  • Need process evaluation
  • Customer complaints received
  • Compliance audit upcoming

Priority Service Available

(877) 489-3727

Expert technicians nationwide

Coating Defects Guide FAQ

Common questions about this issue

In order of frequency: 1) Contamination (dust, silicone, oil), 2) Application issues (technique, gun setup), 3) Environment (temperature, humidity), 4) Material issues (mixing, age), 5) Surface prep failures.
Systematic approach: maintain booth environment, regular filter changes, disciplined surface prep, proper spray technique training, material management, and quality checkpoints throughout process.
Yes, if defects are consistent or worsening. Continuing production creates rework pile. Stop, identify root cause, fix, then verify with test panels before resuming.
Photo documentation, defect type, location on part, batch/time, booth conditions, material lot, operator. This data helps identify patterns and root causes.

Have a question not answered here?

Call us at (877) 489-3727

Related Problems

Orange Peel FinishFisheye DefectsDust ContaminationBlushing Clear CoatPoor Finish QualityCoating Adhesion Problems

Can't Fix It? We Can.

WERCS expert technicians service paint booths and extraction systems nationwide. 24/7 emergency service available.

Call (877) 489-3727Request Service Quote