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If you’re making repairs to a resin wardrobe, especially when applying several layers of putty, fibreglass, or filler, sanding between layers is a key step for professional results. Skipping this stage can lead to uneven surfaces or weak adhesion, so here’s why sanding matters and how to get it right.
Why Sanding Between Layers Matters
Sanding each layer not only smooths out imperfections, but also creates a slightly rough surface for better bonding with the next layer. This is especially important when using products like the CROP 2K Fiberglass Putty or similar fibreglass-based fillers, which perform best when applied in stages. Sanding ensures the layers interlock without air gaps and helps the repair withstand daily wear and tear.
How to Sand Between Repair Layers
- Allow the current layer to cure fully according to product instructions.
- Use fine to medium grit sandpaper to gently level out irregularities and dull the surface.
- Remove dust with a dry cloth before proceeding.
- Repeat the process for any subsequent layers until the repair is fully built up.
Proper sanding pays off when it comes to the final finish—smooth, seamless, and ready for paint or another topcoat.
When This Matters Most
Layering and sanding are most important for larger repairs—such as rebuilding broken panels or filling deep holes—where a single application might shrink or crack. Fine surface repairs may get by with more minimal sanding, but whenever strength and appearance matter, aim for careful preparation between every coat.
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Following a step-by-step repair and sanding process helps you restore resin wardrobes to their best, ensuring a lasting finish. For more advice, head back to our main wardrobe repair guide.