Automotive Refinishing Workbook: Surface Prep, Spray Technique, and Color Matching

Good spray technique is the most visible skill in automotive refinishing, but it rests on a foundation of surface preparation and product selection that most technicians spend years learning through expensive mistakes. This workbook structures the preparation and application process into documented, checkable steps so each stage builds correctly on the last. By the end of this course you will be able to prepare a repair area to the correct surface profile for primer application, mix a basecoat to the correct viscosity and reducer ratio, execute a spray pattern that produces even film build without sags or dry spray, and apply a clear coat that cures to a level surface requiring minimal polishing. What you will learn: - Surface preparation sequence: featheredge sanding, guide coat use, and surface profile verification before priming - Primer selection and mixing: high-build primers for heavy sanding scratches versus fine primers for direct-to-metal applications - Masking techniques: precise edge masking, jamb masking, and blend masking for partial panel repairs - Spray gun setup: fluid tip selection, air cap adjustment, fan width, and fluid delivery rate for different products - Spray technique fundamentals: gun distance, pass overlap, speed, and triggering at panel edges - Basecoat application: wet-on-wet pass timing, metallic orientation passes, and coverage verification - Clear coat application: flash time after base, number of coats, and wet-edge management on adjacent panels - Color sanding and polishing: identifying defects requiring cutting and the compound progression from cut to finish Each module presents the procedure, describes how an experienced refinisher executes it with specific technique notes, and provides a checklist for use during supervised shop practice. A defect diagnosis chart helps trace surface problems to specific technique or preparation errors. Written for refinishing students and apprentice painters in a shop setting who want a structured procedure reference alongside their supervised training. Suitable for anyone new to spray application work. This course is educational; automotive spray work requires proper respiratory protection and ventilated facilities, and supervised hands-on training is required before independent application work. Safety data sheets for all products used must be reviewed before use.