Making nails holes invisible is usually a two-day process: Fill today, sand tomorrow. DAP DryDex Spackling is a fast-drying product that features a colorful “dry time indicator” — the material starts out pink, then turns white when it’s ready to sand and paint. The maker says that drying time varies from one to five hours, depending on weather conditions and depth of fill. It can be used inside or outside, on drywall, plaster, wood, brick, and stone. A one-quart tub sells for about $7. DAP Products, 800/543-3840,

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