Before heat molding your boots, try them out first. It is very possible that heat molding is not necessary. An opportunity and location where you can skate. With your skates on and laced loosely, begin warming the ankle area with the heat gun.
Velcro is extremely sensitive to heat.
Just a small amount of heat can destroy the Velcro closure. Keep the heat away from the Velcro . We try to heat only the carbon fiber closest to the desired area to be molded. The heat will penetrate up to the target area. This will reduce the chance of scorching the leather or melting the Velcro .