I would not recomemd using a hot gun or a hair dryer.
Most electronic boards are sensitive to electrostatic discharge and hot gun and hair dryer is powered from ac line,so air flow pass through high voltage elements and there are friction too who can electrize air.
In a ordinary hot air soldering station heating element is working at low voltage ~ 30 volts if I remember right and heating element and whole metalic head are well grounded to earth ground.
Most electronic boards are sensitive to electrostatic discharge and hot gun and hair dryer is powered from ac line,so air flow pass through high voltage elements and there are friction too who can electrize air.
In a ordinary hot air soldering station heating element is working at low voltage ~ 30 volts if I remember right and heating element and whole metalic head are well grounded to earth ground.







