An alcohol burner expresses a large flame vertically and can also shoot a directional flame, which is around 1mm in diameter, by squeezing the burner. Using a heat gun or hairdryer to remove the bubbles introduces a huge risk of dust particles being blown into the finish. The advantage of using an alcohol burner is that a quick directional flash will remove small bubbles caught in the epoxy. Because the flame is so small it eliminates the risk of carrying dust particles into the epoxy. It is also useful for gradually increasing the temperature in the epoxy mix.
Fill with denatured alcohol (methylated spirits)