While having a heat gun can be useful for certain candle-making techniques or if you encounter specific issues during the process, it is not always necessary when making candles. A heat gun is predominantly used to fix frosting (a white crystalline appearance on candles) but other methods can be employed like pouring at a lower temperature or using different types of wax additives. However, if you do decide to use a heat gun, exercise caution as it emits high temperatures and remember to follow safety guidelines provided by the manufacturer's instructions such as wearing protective gloves and goggles along with working in a well-ventilated area.