Don't blow it directly at 90 degrees with a hot air tool.
The recommended distance from the hot air tool tuyere is 50 - 60mm away from the heating items.
The single use time of the hot air tool should not be too long, usually 2 - 3 minutes. If the temperature of the fuselage is obviously increased, please close the hot air tool and wait for the cooling to use.
Please allow 1-2cm errors due to manual measurement.
Item color displayed in photos may be showing slightly different on your computer monitor since monitors are not calibrated same.