Airless Painting Course

Lesson 1 • How Airless Sprayers Work

Covers pressure-driven fluid atomisation and how it differs from air-assisted methods. Establishes the mechanical baseline for all subsequent equipment and technique chapters.

Lesson 2 • Major Equipment Components

Identifies every functional part of an airless unit, from motor to gun. Students map component relationships and understand how each part affects output quality.

Lesson 3 • Workspace and Environmental Basics

Defines minimum workspace requirements for safe and effective airless application. Students assess ventilation, lighting, and surface access before any job begins.

Lesson 1 • Personal Protective Equipment

Specifies correct PPE selection and fit for airless painting tasks and coating types. Proper PPE prevents respiratory, dermal, and eye exposure to hazardous materials.

Lesson 2 • Safety Data Sheet Interpretation

Trains students to extract critical hazard and handling data from coating safety documentation. Accurate SDS reading drives correct PPE, storage, and disposal decisions.

Lesson 3 • High-Pressure Injection Hazards

Explains the severe tissue-injection risk unique to airless equipment and how to prevent it. This risk distinguishes airless safety from conventional painting and demands priority attention.

Lesson 4 • Flammability and Ventilation Control

Addresses fire and explosion risks from solvent-borne coatings and airborne overspray. Students apply ventilation calculations and ignition-source elimination strategies.

Lesson 1 • Primer and Topcoat System Planning

Guides students in designing a complete coating system from primer through finish coat. System planning ensures adhesion, durability, and appearance goals are met efficiently.

Lesson 2 • Substrate and Coating Compatibility

Teaches how substrate material, condition, and porosity determine coating selection. Mismatched products cause adhesion failure, so compatibility assessment is a critical pre-job skill.

Lesson 3 • Mixing, Straining, and Pot Life

Establishes correct mixing procedures for single- and two-component coatings and explains pot life limits. Improper mixing causes curing failures and equipment damage.

Lesson 4 • Viscosity Measurement and Adjustment

Covers viscosity testing methods and thinning procedures to achieve sprayable consistency. Correct viscosity prevents tip clogging, poor atomisation, and sagging defects.

Lesson 1 • Rust and Corrosion Treatment

Addresses rust removal grades and chemical conversion treatments for ferrous metal substrates. Residual corrosion under coatings causes premature failure on metal surfaces.

Lesson 2 • Masking and Surface Protection

Trains students to protect adjacent surfaces and fixtures from overspray and drips. Efficient masking saves rework time and protects client property.

Lesson 3 • Mechanical Surface Profiling

Teaches sanding, grinding, and abrasive blasting to create anchor profiles for coating adhesion. Profile depth must match coating thickness requirements for reliable bonding.

Lesson 4 • Cleaning and Contamination Removal

Covers methods for removing dirt, grease, mould, and soluble salts from surfaces before coating. Contamination is the leading cause of coating failure and must be eliminated first.

Lesson 1 • Filter and Strainer Maintenance

Teaches in-line filter inspection and cleaning to prevent tip clogs during production. Filter maintenance is a daily task that directly affects spray quality and uptime.

Lesson 2 • Tip Selection and Installation

Guides correct tip size selection based on coating type, fan width, and flow rate needs. The tip is the most critical variable controlling pattern, coverage, and finish quality.

Lesson 3 • Pressure Setting and Adjustment

Explains how to set and fine-tune pump pressure for optimal atomisation with different coatings. Incorrect pressure causes defects ranging from orange peel to excessive overspray.

Lesson 4 • Hose and Gun Configuration

Covers hose length, diameter, and whip-hose selection for different job layouts. Proper configuration maintains pressure delivery and reduces operator fatigue.

Lesson 1 • Gun Distance and Angle

Establishes the correct standoff distance and perpendicular gun angle for uniform film build. Deviating from correct distance and angle causes uneven coverage and finish defects.

Lesson 2 • Multi-Pass and Film Build Strategy

Teaches how to build specified film thickness through multiple controlled passes. Achieving correct dry film thickness is essential for coating performance and warranty compliance.

Lesson 3 • Stroke Speed and Overlap

Trains consistent arm speed and 50% overlap to achieve uniform wet film thickness. Speed variation is the most common cause of runs, sags, and thin spots.

Lesson 4 • Spraying Corners, Edges, and Trim

Covers technique modifications for inside corners, outside edges, and narrow trim elements. These areas require reduced pressure and shorter strokes to avoid buildup and bleed.

Lesson 1 • Wet and Dry Film Repair Methods

Teaches how to correct defects in wet film immediately and how to sand and recoat dry defects. Timely wet correction avoids the labour cost of full dry-film rework.

Lesson 2 • Common Finish Defects Identified

Catalogues runs, sags, orange peel, fisheye, and dry spray with their visual signatures. Accurate defect identification is the prerequisite for selecting the correct corrective action.

Lesson 3 • Coating Material Defect Causes

Identifies defects caused by incorrect viscosity, contamination, or incompatible products. Material-related defects require product correction, not just technique adjustment.

Lesson 4 • Equipment Malfunction Diagnosis

Covers pump surging, tip clogging, pressure loss, and gun leaks with step-by-step diagnosis. Equipment faults must be isolated quickly to minimise downtime and coating waste.

Lesson 1 • Long-Term Storage and Winterisation

Establishes procedures for storing equipment through extended downtime and cold-weather periods. Improper storage causes frozen pumps, cracked seals, and corroded components.

Lesson 2 • Valve and Seal Inspection

Guides inspection and replacement of inlet and outlet ball valves and seat seals. Worn valves cause pressure loss and pump surging that degrade spray quality.

Lesson 3 • Tip and Guard Maintenance

Covers tip wear measurement, cleaning, and replacement scheduling to maintain pattern quality. A worn tip increases material consumption and degrades finish quality significantly.

Lesson 4 • Daily Flush and Cleaning Procedures

Covers end-of-day flushing sequences for water-borne and solvent-borne coatings. Residual coating left in the system hardens and causes irreversible pump and valve damage.