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Painting refreshes interior spaces and protects surfaces. Success requires preparation: cleaning surfaces, filling holes, sanding rough spots, and protecting areas you don't want painted. Understanding paint types, brushes, and roller techniques helps you achieve professional-looking results.
Help prepare a wall for painting by cleaning and filling holes. Help paint under supervision, starting with brushwork around edges and rolling the main surface. Practice keeping paint edges clean and maintaining a wet edge for smooth coverage.
Painting is just slapping paint on walls. (Preparation takes longer than painting and determines final quality.) You need expensive equipment. (A quality brush, roller, and tray are sufficient.)
From your work with basic hand tools, you know that the right tool applied correctly produces results the wrong tool cannot — and that preparation is often the majority of the job. Interior painting is a perfect illustration: professionals spend roughly 80% of their time on preparation and 20% applying paint. The final appearance is largely determined before a drop of paint touches the wall.
Surface preparation involves three tasks: cleaning, patching, and priming. Walls accumulate grease (especially in kitchens), dust, and soap film that prevent paint adhesion. Wash walls with a mild detergent and rinse well; paint applied over a dirty surface will peel within months. Next, fill any holes or cracks with spackle or joint compound, let it dry fully, and sand smooth — sanding creates the slight tooth that paint bonds to. For bare drywall, fresh patches, or drastic color changes (white over red), apply a primer first. Primer is not just diluted paint — it's formulated to bond to the substrate and create a uniform surface for topcoats. Skipping primer when it's needed means uneven sheen, bleed-through, or multiple extra coats of expensive paint.
Paint selection involves two main choices: sheen and type. Flat/matte paint hides surface imperfections best but is less washable — good for low-traffic ceilings. Eggshell and satin balance washability and appearance, making them the standard for walls in living areas and bedrooms. Semi-gloss and gloss are highly durable and moisture-resistant, appropriate for trim, doors, cabinets, and bathrooms where frequent wiping is needed. For type: latex (water-based) paint dries quickly, cleans up with soap and water, and works for almost all interior applications. Oil-based paint is more durable and self-leveling but has long dry times, strong fumes, and requires mineral spirits for cleanup — typically reserved for trim and cabinets that take heavy wear.
Application technique starts with cutting in: using a brush to paint a 2–3 inch strip along all edges (corners, ceiling line, baseboard, trim) before rolling the main field. This establishes clean lines without tape in many cases, or works inside tape when precision is critical. Rolling the main surface requires maintaining a wet edge — always extending your roller into the previously painted area while it's still wet, to avoid lap marks where dried and fresh paint meet. Apply in overlapping W or M patterns, then even out with light vertical strokes. Two thin coats almost always beat one thick coat: thick applications drip, sag, and dry unevenly. Light sanding between coats (once fully dry) produces a smoother final surface.