When performing lead loading on a complex curved panel, what specific technique is employed to control the heat transfer and prevent 'burning' or crystallization of the lead, ensuring a homogenous, strong, and workable fill?

The specific technique employed to control heat transfer and prevent 'burning' or crystallization of the lead, ensuring a homogenous, strong, and workable fill on a complex curved panel, is a combination of skilled, intermittent heat application and active heat management using spreading tools. This involves a precise method of thermal control during the lead loading process, where lead, typically a lead-tin alloy, is used as a filler on a complex curved panel, which is a metal surface with multiple radii and contours.