How-to guides are checked against manufacturer instructions and safety data sheets for the specific paint types discussed. Where a guide makes a claim about drying time, coverage, or compatibility between products, that claim is checked against the manufacturer's own documentation rather than assumed from general practice.
Calculators
Coverage and cost calculators use published manufacturer coverage rates as their default assumptions, and clearly state that a specific product's label should be checked before buying, since coverage varies by surface and paint type.
Brand and product comparisons
Cross-brand color matching is presented as a visual approximation, not a guarantee of an exact match — paint formulations differ between manufacturers, and we say so directly rather than implying certainty the underlying data doesn't support.