When a product performs both cleaning and polishing functions, classification depends on the product's essential character and primary marketed function. CBP's General Rules of Interpretation guide this analysis; if the polishing or protective function predominates, the product typically falls here. A binding ruling from CBP is the most reliable way to resolve dual-function product classification.

Yes — aerosol products are regulated as pressurized containers under DOT hazardous materials rules (49 CFR), requiring UN-specification packaging, proper hazard labeling, and shipper's declaration documentation. Additionally, aerosols containing VOC-regulated propellants may be subject to EPA or state air quality regulations that affect formulation requirements for products sold in certain US markets.