xxiii Overlap ................................................................688 Stroke ...................................................................688 Triggering ............................................................689 Match the Technique to the Job ......................689 Medium Wet Coat ..............................................689 Full Wet Coat ......................................................689 Drop Coat ............................................................690 Mist Coat .............................................................690 Tack Coat .............................................................690 Blend Coat ...........................................................690 Control Coat .......................................................690 Dust Coat ............................................................690 Paint Type ...........................................................690 Spraying Body Panels ......................................690 Painting Long Panels .........................................691 Panel Refi nishing ...............................................691 Other Painting Considerations .......................693 Spray Booth Type ...............................................694 Air Hose ..............................................................694 Spray Gun Cleaning .........................................695 Solvent Borne Cleaning.....................................695 Waterborne Cleaning .........................................696 CHAPTER 29 Surface Preparation 701 Introduction .......................................................702 Surface Preparation Standards ........................702 Basic Surface Preparation Procedures ...........703 Inspect .................................................................703 Plan ......................................................................705 Wash.....................................................................706 Remove Obstructions ........................................706 Pre-Sand Cleaning .............................................706 Paint Removal ....................................................707 Masking for Undercoats ...................................710 Metal Conditioning ...........................................712 Apply Undercoats ..............................................713 Block Sanding .....................................................714 Finish Sand .........................................................716 Blow Off Vehicle .................................................717 Clean with Pre-Paint Solvent ...........................717 Mask for Topcoat ...............................................717 Blow Off Vehicle .................................................722 Tack ......................................................................724 Seam Sealer .........................................................724 Rocker Panel Spray ............................................724 Surface Preparation for Specifi c Types of Damage ......................................................725 Scratch .................................................................725 Body Filler ...........................................................726 Bare Metal ...........................................................726 Weld .....................................................................726 Rust ......................................................................727 Repaint ................................................................728 Blend ....................................................................728 Melt ......................................................................728 Trim ......................................................................729 CHAPTER 30 Color Matching 733 Introduction .......................................................734 Color Description ...............................................734 Light and Color ..................................................735 Light .....................................................................735 Colors...................................................................737 Comparing Two Colors .....................................740 Alternate Formulas ............................................741 Comparison Panel .............................................741 Plotting a Color ..................................................743 Spectrophotometer ............................................743 Altering the Refi nish Color .............................745 Metallic Orientation ..........................................745 Tinting .................................................................746 Tricoats ................................................................749 CHAPTER 31 Paint Application 753 Introduction .......................................................754 Planning the Repair ..........................................754 Contamination Prevention ..............................754 Applying Paint ..................................................757 Applying Single-Stage Paint ............................757 Applying Basecoat/Clearcoat Paint................760 Applying Tricoat Paint ......................................766 Blending Strategies ...........................................767 Blend within a Repaired Panel ........................767 Blending Adjacent Panels .................................768 Baking .................................................................770 Removing Masking Materials ..........................772 Troubleshooting ................................................772