The Surface Prep Secret Every Painter Gets Wrong

From textured plastics and PVC to aluminum, wood, chrome delete, and rusted steel—we walk you step-by-step through proper surface prep so your paint actually sticks and doesn’t delaminate. Learn the right DA sander grits (180/320/400), how to use Scotch-Brite (maroon/gray), when to apply wax & grease remover, why adhesion promoter = insurance, and when to lock metal down with epoxy primer. We even cover speed shapes for color testing and tips to avoid fisheye. 00:00 Intro & materials 00:30 Plastics overview (PVC, speed shape, textured) 01:26 DA grit picks & pencil trick (coverage) 03:53 Speed shape / RC prep (maroon vs gray pad) 08:02 Textured plastic: scuff + promote + epoxy/2K plan 14:42 Aluminum board: 320 DA, maroon pad, promote, epoxy 20:00 Why adhesion promoter = “insurance” 20:06 Wood: 180 DA, 2K build process 23:19 Cured clear: 800 + gray pad refresh 27:18 Chrome delete approach: sand + promote + prime 32:03 Bare steel: 180 to bright, clean, epoxy (humidity notes) 36:02 Wrap-up & next steps (primers, aerosols vs gu¨n) 🛠 Products shown (adhesion promoter, epoxy, fillers, primers) are available on our site. Got questions? Drop them below—Manny & Javi will help! #SurfacePrep #CustomPaint #LowriderPaint