During and after painting
As you work, keep a damp cloth on hand to wipe up any drips before they have time to dry. Recent but drying drips on dry, nonporous surfaces can often be wiped away with a wet cloth, mineral spirits or paint thinner.
When cleaning up, remove masking tape before paint has a chance to dry. This will reduce the possibility of lifting the fresh paint film with the tape. If paint has dried, score lightly along the edge of the tape with a utility knife or razor blade before removing.
Allow paint to dry thoroughly before scraping off glass with a razor or scraper.
Fold the edges of drop cloths and plastic sheets toward the middle to avoid getting small spills or drips on surrounding surfaces.
Clean tools, such as edgers, scrapers and paint trays, immediately after completing the job to prevent the paint drying permanently on them and wipe dry to prevent rust. Use warm, soapy water to remove latex paint. Use mineral spirits or paint thinner to remove oil paint.
Clean brushes and roller covers before they dry.
Allow tray liners to dry before discarding.
When using a latex-based product, clean up hands and tools with soap and water. Wipe oil paints off hands with a cloth dampened with mineral spirits or paint thinner, then wash hands with soap and water.
Hang oily rags to dry completely before laundering or immerse in an open container filled with water. Oily rags, particularly if piled up or placed in a closed container or space, are at risk of spontaneous combustion.