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Bubbles in an epoxy resin coating can spoil an otherwise flawless finish, especially on detailed wood projects like spearguns. Thankfully, there are practical ways to remove them and ensure a clear, professional look.
Why do bubbles form in epoxy resin?
Air bubbles can appear when mixing epoxy resin or when applying it to surfaces with small pores, such as wood. Vigorous stirring or uneven spreading are common causes. While some bubbles may rise and pop naturally as the resin settles, many remain trapped if not treated quickly.
Practical steps to eliminate bubbles
- After pouring your epoxy resin—such as Art Pro for clear coatings—wait a minute to allow air bubbles to surface.
- Gently pass a heat gun or hairdryer on a low setting over the resin surface. Move steadily and avoid lingering to prevent overheating or damaging the finish.
- Tools like a tooth-shaped spatula can help spread the resin evenly, which also reduces trapped air.
- For wood surfaces, sealing first with a low-viscosity product such as EpoxyWood will further minimise the risk of bubbles caused by porous grain.
When bubble removal matters most
For items exposed to close inspection or functional use, such as spearguns, a flawless finish not only enhances appearance but may also improve waterproofing. Taking a moment to remove bubbles ensures durable results and preserves the surface.
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By carefully treating bubbles during application, you can achieve smooth, clear epoxy finishes ideal for speargun restoration and similar projects. For more tips on getting the best results, see our full guide on applying epoxy resin to a speargun.