What type of spot putty is recommended for quick curing and reduced shrinkage?

The recommended type of spot putty for quick curing and reduced shrinkage is two-part putty. This type of putty consists of a base and a hardener that, when mixed together, initiate a chemical reaction leading to rapid curing. This property is particularly beneficial in auto body repair work, where fast turnaround times are often critical.

Two-part spot putties are formulated to provide a strong bond and minimize the risk of shrinking as they cure, ensuring a smooth and durable finish. This efficiency in both curing time and reduction in volume loss makes two-part putties ideal for automotive applications, particularly when repairing dents or imperfections in bodywork.

In contrast, other types of putties, such as single-part or water-based putties, may not cure as quickly or may have different shrinkage properties, which can affect the quality of the repair over time. Foam-based putties, while useful in specific applications, do not typically offer the same level of durability and structural integrity required for most auto body repairs as two-part putties do.