The difference between fast-drying, standard-drying and slow-drying car paint

Fast-Drying Paint:
Best suited for: Low temperatures (5-15°C).
Application: Suitable for small, partial repairs or when quick turnaround time is needed.
Example: High-velocity clears with fast hardeners are commonly used in collision repair shops for quick drying and same-day polishing.
Standard-Drying Paint:
Best suited for: Moderate temperatures (15-28°C).
Application: Ideal for whole car spray or partial repairs in normal temperature ranges.
Example: Standard hardeners are often used in collision repair shops when a more balanced drying time is needed.
Slow-Drying Paint:
Best suited for: High temperatures (28-35°C) or high humidity.
Application: Used for whole car spray, large-area applications, or when extended open time is required.
Example: Slow hardeners are used in collision repair shops when a more balanced drying time is needed.
Key Factors Influencing Drying Time:
Temperature:
Higher temperatures accelerate drying, while lower temperatures and high humidity slow it down.
Humidity:
High humidity can slow down drying, potentially leading to paint defects like blooming or loss of gloss.
Ventilation:
Good ventilation helps evaporate solvents and speeds up drying.
Paint Type:
Different types of paint, like acrylic lacquer, acrylic urethane, or high-solids clears, have varying drying and curing times.
Repair Size:
Small repairs can benefit from fast-drying options, while larger repairs may require slow-drying options for better flow and leveling.