Short answer: a torch pops surface bubbles fastest on flat coats; a heat gun is gentler for silicone molds, tumblers and small pieces, but can blow resin and dust around.
| Butane/propane torch | Heat gun | |
|---|---|---|
| Best for | tabletops, bar tops, flat art | molds, tumblers, cells & lacing effects |
| Speed | fastest | slower |
| Risk | scorching, fire near solvents | ripples, blowing dust |
| Technique | keep moving, a few inches away | low speed, keep moving |
Keep flames away from alcohol, solvents and plastic sheeting. More bubble fixes: how to get bubbles out of resin.
It blows too much air at too little heat and moves dust onto the surface; a heat gun or torch works better.
A quick pass a few minutes after pouring, then once or twice more in the first 30–45 minutes; don't linger.
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