Learn where 360 grit sandpaper fits after 320 grit, how to inspect the surface, and when to step finer.
Learn where 320 grit sandpaper fits after 280 grit, when it is useful between coats, and when to move to 360 or 400.
Learn where 280 grit sandpaper fits after 240 grit, when it is useful before finer sanding, and how to inspect the scratch pattern.
Learn where 240 grit sandpaper fits after 220 grit, when it is useful before coatings, and when to step finer.
Learn when 220 grit sandpaper is the right prep step, how it differs from 180 and 240 grit, and how to avoid over-smoothing.
Learn where 180 grit sandpaper fits after 150 grit, when it can be a finish-prep step, and when to move to 220 grit.
Learn where 150 grit sandpaper fits between 120 and 180 grit, what it is best for, and how to avoid leaving visible finish scratches.
Learn when 120 grit sandpaper is the right starting or follow-up grit, how it differs from 100 and 150 grit, and how to avoid over-sanding.
Use quick checks after every grit: wipe clean, inspect under angled light, and only move up if the scratch pattern is uniform. This workflow sands a acrylic bathtub surround to scuff for paint adhesion without deep scratches from 320 to...