Yes, sanding old residential paint in structures built prior to the 1978 federal ban carries a severe risk of inducing acute lead poisoning. Sanding pulverizes legacy layers of lead paint into microscopic, invisible dust particles and toxic fumes that can easily be inhaled deep into the lungs or ingested accidentally. This hazardous activity requires rigorous containment, protective respirators, and professional HEPA-filtered vacuum systems to prevent dangerous heavy metal contamination.