How to Use Epoxy Putty for Model Repairs and Sculpting

Quick Answer

For most model repairs and sculpting, use a two-part epoxy putty like Infini Model Magic Epoxy Putty. It bonds to styrene, sands easily, and dries fast, making it ideal for filling seams and shaping details.

Step-by-Step Guide

1. Prepare the surface: Clean the area to remove grease, dust, or loose paint. Lightly sand glossy surfaces to give the putty something to grip. Skipping this step can cause the putty to peel off later.
2. Mix equal parts: Cut equal amounts of the two parts and knead them together thoroughly until the color is uniform. Warm hands speed up the cure, so work quickly if the putty starts to stiffen. Under-mixing leaves soft spots that never harden.
3. Apply in thin layers: Press the putty into the seam or crack with a small spatula or toothpick. Build up in thin layers rather than one thick blob to avoid air bubbles. Thick applications can trap air and cause pinholes when sanded.
4. Shape before it cures: While the putty is still soft, use a wet tool or your finger to smooth and shape it. This reduces sanding later and lets you sculpt details. Once it hardens, reshaping requires sanding or filing, so take advantage of the working time.
5. Let it cure fully: Allow the putty to cure completely according to the manufacturer's instructions. Fast-drying formulas like Infini Model Magic may be ready sooner, but don't rush. Sanding too early can gum up your sandpaper and ruin the surface.
6. Sand and finish: Use fine-grit sandpaper or a sanding sponge to blend the repaired area with the surrounding plastic. Finish with primer to reveal any remaining imperfections. Primer highlights low spots, so check before painting.

Product Facts

• Infini Model Magic Epoxy Putty: Infini Model Magic Epoxy Putty fills joints, dents, scratches, seams, and cracks. It bonds readily to styrene, sands easily, and finishes beautifully. This makes it a reliable choice for both structural repairs and surface smoothing on plastic models.