Paint Surface Prep Checklist: Clean, Repair, Sand, Prime or Stop?
A decision-first surface-preparation checklist for deciding what to clean, repair, sand, prime, test or investigate before interior painting.
Interior painting guidance focused on measurable wall area, preparation, primer decisions, coating sequence, sheen and troubleshooting common finish defects.
5 published guides in this topic.
A paint estimate answers how much coating a measured surface may require. Surface preparation, primer choice and finish defects are separate questions that depend on what is already on the wall and what condition it is in.
Calculate net wall area instead of guessing by room name.
Decide whether cleaning, repair, sanding or primer is actually needed.
Choose sheen by room use and cleaning needs rather than a single “best” finish.
Diagnose roller marks, lap marks and flashing before adding another coat.
Measure first, inspect the surface second, then verify the exact coating instructions. Keep theoretical coverage separate from real purchase quantities and container sizes.
A decision-first surface-preparation checklist for deciding what to clean, repair, sand, prime, test or investigate before interior painting.

Learn what three common paint defects look like, why they happen, and what to check before assuming another coat will solve everything.

A worked bedroom painting plan that calculates wall area, separates prep from coating, and shows how drying time changes a weekend schedule.

Choose primer based on bare substrate, repairs, stains, adhesion and color transition instead of treating it as a compulsory extra coat.

Choose sheen by cleaning demand, surface quality, light and touch frequency rather than using one finish throughout the entire home.