The drying time for surface spraying on urban outdoor metal furniture typically ranges from 2-8 hours for touch dryness and 24-72 hours for full cure. Several factors significantly influence drying duration: environmental conditions (temperature 18-25°C and humidity below 60% ideal), coating type (epoxy, polyurethane, or powder coatings), film thickness, and manufacturer's specifications.
For optimal results, apply thin, even coats allowing proper flash-off time between applications. Water-based coatings generally dry faster than solvent-based alternatives, while powder coatings require baking for complete curing. Remember that surface preparation - proper cleaning, sanding, and priming - significantly affects drying efficiency and final durability.
Complete curing is essential before exposing furniture to outdoor elements, as premature exposure to moisture, UV radiation, or temperature fluctuations can compromise the finish's weather resistance and longevity. Always follow the specific product manufacturer's recommendations for the precise drying and curing times applicable to your particular coating system and environmental conditions.