If you're using a heat gun or a small butane torch they will not get hot enough to pop the bubbles in our high heat resin formulation. If you heat the resin too long, it will make the resin thinner, you may even scorch it and you’ll still have bubbles. Propane burns hotter and can quickly reach and eliminate the bubbles!
We recommend the Bernzomatic ts4000 and camping gas (green can). You want the gas in the GREEN can, the blue is hotter, the yellow is the hottest!