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4P AUTOMOTIVE REPAIR AND FINISHING SYSTEM

Step 1: Prep

This step is extremely important and is the foundation to all successful refinishing projects. Areas that have rusted through will need to be cut out and replaced with new metal, welded in and sanded flat. Areas that have dents, dings, and body imperfections will need to be been filled with body filler or finishing glaze. Once cured, the repair area will need to be shaped and feathered to match existing contours.

  • P24 - Extreme Removal
    Best for rust removal, grinding and smoothing welds
  • P36 - Extreme Removal
    Best for rust removal, grinding and smoothing welds
  • P40 - Extreme Removal
    Best for rust removal and rough shaping fiberglass
  • P50 - Extreme Removal
    Best for rust removal
  • P60 - Extreme Removal
    Best for rust removal
  • P80 - Coarse Removal
    Best for removal of rust, paint, primer and shaping body filler
  • P100 - Moderate Removal
    Best for removal of paint, primer and shaping body filler
  • P120 - Moderate Surface Preparation
    Best for sanding and shaping of body fillers
  • P150 - Light Surface Preparation
    Best for sanding and shaping of body fillers
  • P180 - Final Surface Preparation
    Best for sanding and shaping of body fillers
  • P220 - Fine Scuffing
    Best for feathering and surface leveling
  • P320 - Extra Fine Scuffing
    Best for feathering and surface leveling

Sanding Tip

Feathering is the process of sanding back the edge of the repair area to reveal individual layers of body filler, paint, primer and factory e-coats. This process ensures a smooth transition from the repair area to the topcoat of the surrounding surface eliminating a hard edge.
When using, Waterborne products refer to manufactures application guide.

Step 2: Prime

To prepare the surface for primer, you’ll need to scuff hard to reach areas with P360 to promote proper adhesion of primer. P400-P600 are used after primer is applied to smooth and level surface. It also ensures proper mechanical adhesion of paint to the automotive surface.

  • P360 - Super Fine Scuffing
    Best for scuffing hard to reach areas before primer.
  • P400 - Super Fine Sanding
    Best for sanding and smoothing primer for application of basic (non-metallic) colors.
  • P500 - Super Fine Sanding
    Best for sanding and smoothing primer for application of basic (non-metallic) colors.
  • P600 - Ultra Fine Waterproof
    Best for sanding and smoothing primer for applications of metallic colors / also sanding clearcoat on blend panels.

Sanding Tip

After the primer has been applied, it is recommended to use a guide coat. This is the process of spraying guide coat paint (darker colors on light and lighter colors on darker) on the repair area, then block sand the area to level the surface. This process will reveal high and low points to ensure a quality repair before applying top coats.

Step 3: Paint

When blending is necessary use P800 to scuff around the repair area to ensure proper mechanical adhesion to the top coats. P1000-P2500 are used after the application of top coats to remove imperfections, and smooth the surface before polish.

  • P800 - Ultra Fine Waterproof
    Best for light scuff sanding before applying color & clear coats
  • P1000 - Mirror Fine Waterproof
    Best for removing orange peel, dirt nibs and clear coat runs
  • P1200 - Mirror Fine Waterproof
    Best for removing orange peel, dirt nibs and clear coat runs
  • P1500 - Mirror Fine Waterproof
    Best for removing dirt nibs and clear coat runs
  • P2000 - Micro-Fine Waterproof
    Best for smoothing clear coats before buffing to a high gloss finish
  • P2500 - Micro-Fine Waterproof
    Best for smoothing clear coats before buffing to a high gloss finish

Sanding Tip

Pre-soaking Finish 1st waterproof sandpaper with a couple of drops of liquid soap detergent is recommended so the sandpaper becomes soft and flexible. Wet sanding will help wash away sanding particles during the sanding process, to ensure maximum life of waterproof sheets.

Step 4: Polish

This is the final step before applying compound and polish in the creation of the ultimate shine. The ultra-fine grits are the starting points to bring back the shine to the dull clearcoat surface created in the previous step. Once you all your sanding is done, choose your favorite compound and polish to bring out the luster of your finish.

  • P3000 - Micro-Fine Foam
    Best for wet sanding before polishing
  • P5000 - Micro-Fine Foam
    Best for wet sanding before polishing

Sanding Tip

Wet sanding with P3000 and P5000 cushioned abrasives greatly reduces cut and buff time.

Finish 1st® Sandpaper Selection Guide

WATERPROOF

Best for sanding automotive primers, paints, & clear coats.

  • P120 - Moderate Surface Preparation
    Best for sanding and shaping of body fillers
  • P150 - Light Surface Preparation
    Best for sanding and shaping of body fillers
  • P180 - Final Surface Preparation
    Best for sanding and shaping of body fillers
  • P220 - Fine Scuffing
    Best for feathering and surface leveling
  • P320 - Extra Fine Scuffing
    Best for feathering and surface leveling
  • P360 - Super Fine Scuffing
    Best for scuffing hard to reach areas before primer.
  • P400 - Super Fine Sanding
    Best for sanding and smoothing primer for application of basic (non-metallic) colors
  • P500 - Super Fine Sanding
    Best for sanding and smoothing primer for application of basic (non-metallic) colors
  • P600 - Ultra Fine Waterproof
    Best for sanding and smoothing primer for applications of metallic colors / also sanding clearcoat on blend panels
  • P800 - Ultra Fine Waterproof
    Best for light scuff sanding before applying color & clear coats
  • P1000 - Mirror Fine Waterproof
    Best for removing orange peel, dirt nibs and clear coat runs
  • P1200 - Mirror Fine Waterproof
    Best for removing orange peel, dirt nibs and clear coat runs
  • P1500 - Mirror Fine Waterproof
    Best for removing dirt nibs and clear coat runs
  • P2000 - Micro-Fine Waterproof
    Best for smoothing clear coats before buffing to a high gloss finish
  • P2500 - Micro-Fine Waterproof
    Best for smoothing clear coats before buffing to a high gloss finish
  • P3000 - Micro-Fine Foam
    Best for wet sanding before polishing
  • P5000 - Micro-Fine Foam
    Best for wet sanding before polishing

(GOLD) ALUMINUM OXIDE

Best for sanding automotive primers, paints, & clear coats.

  • P40 - Extreme Removal
    Best for rust removal and rough shaping fiberglass
  • P80 - Coarse Removal
    Best for removal of rust, paint, primer and shaping body filler
  • P120 - Moderate Surface Preparation
    Best for sanding and shaping of body fillers
  • P150 - Light Surface Preparation
    Best for sanding and shaping of body fillers
  • P180 - Final Surface Preparation
    Best for sanding and shaping of body fillers
  • P220 - Fine Scuffing
    Best for feathering and surface leveling
  • P320 - Extra Fine Scuffing
    Best for feathering and surface leveling
  • P400 - Super Fine Sanding
    Best for sanding and smoothing primer for application of basic (non-metallic) colors

ALUMINUM OXIDE

Best for sanding automotive primers, paints, & clear coats.

  • P36 - Extreme Removal
    Best for rust removal, grinding and smoothing welds
  • P50 - Extreme Removal
    Best for rust removal
  • P80 - Coarse Removal
    Best for removal of rust, paint, primer and shaping body filler
  • P120 - Moderate Surface Preparation
    Best for sanding and shaping of body fillers
  • P180 - Final Surface Preparation
    Best for sanding and shaping of body fillers
  • P220 - Fine Scuffing
    Best for feathering and surface leveling
  • P320 - Extra Fine Scuffing
    Best for feathering and surface leveling
  • P400 - Super Fine Sanding
    Best for sanding and smoothing primer for application of basic (non-metallic) colors
  • P500 - Super Fine Sanding
    Best for sanding and smoothing primer for application of basic (non-metallic) colors
  • P600 - Ultra Fine Waterproof
    Best for sanding and smoothing primer for applications of metallic colors / also sanding clearcoat on blend panels
  • P800 - Ultra Fine Waterproof
    Best for light scuff sanding before applying color & clear coats
  • P1000 - Mirror Fine Waterproof
    Best for removing orange peel, dirt nibs and clear coat runs
  • P1200 - Mirror Fine Waterproof
    Best for removing orange peel, dirt nibs and clear coat runs
  • P1500 - Mirror Fine Waterproof
    Best for removing dirt nibs and clear coat runs
  • P2000 - Micro-Fine Waterproof
    Best for smoothing clear coats before buffing to a high gloss finish

METAL SANDING CLOTH

Best for cleaning steel, iron, aluminum, brass & copper

  • P50 Coarse
    Best for removal of rust, corrosion and paint from metal
  • P80 Medium
    Best for light rust and paint removal from metal
  • P150 Fine
    Best for cleaning metal surfaces before repainting and for cleaning copper

ZIRCONIUM OXIDE

Best for grinding and smoothing welds

  • P24 - Extreme Removal
    Best for rust removal, grinding and smoothing welds
  • P24 - Extreme Removal
    Best for rust removal, grinding and smoothing welds
  • P36 - Extreme Removal
    Best for rust removal, grinding and smoothing welds
  • P50 - Extreme Removal
    Best for rust removal

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