Quick answer

Use hard plastic nano files with gentle, directional strokes to remove mold lines and white stress marks from plastic miniatures, restoring the original grey color without scratching the surface.

Why nano files beat sandpaper for plastic models

Standard sandpaper or metal files can leave deep scratches on soft plastic miniatures. Nano glass files use an ultra-fine grit that shears away material evenly, leaving a polished surface. They also remove the white stress marks that form when plastic is bent or cut, restoring the natural grey color.

Step-by-step nano file cleanup

  1. 1. Identify the mold lines and stress marks: Hold the miniature under good light and rotate it to find raised mold lines along part edges, plus any white or frosted areas from clipping or bending. Common mistake: Skipping this inspection leads to missed lines that show after priming.
  2. 2. Use the flat file for broad surfaces: Grip the slim 8mm flat file at a shallow angle (about 15 degrees) and push it in one direction along the mold line. Do not saw back and forth. Checkpoint: The line should disappear after 3–5 passes. If you see dust, you are pressing too hard.
  3. 3. Switch to the round file for crevices: Use the pointed tip of the round file to reach into armpits, under arms, and between armor plates. Work with short, one-way strokes. Common mistake: Twisting the file in a hole can widen the detail. Keep strokes straight and light.
  4. 4. Blend the treated area: After the line is gone, make two or three extra light passes over the surrounding surface to blend the texture so the spot does not look flattened. Checkpoint: The area should match the adjacent plastic sheen, not appear dull or glossy.
  5. 5. Clean the file and the model: Rinse the nano file under running water to remove plastic dust. Wipe the miniature with a dry cloth to check for any remaining marks. Common mistake: Leaving dust on the model can cause paint adhesion problems later.

  • Hard Plastic Nano Files: The main file has a slim 8mm width for smoothing mold lines on larger surfaces, while the round file has a pointed edge for tight spots. Both are made from nano glass for a scratch-free finish. The dual shapes let you clean flat armor plates and recessed detail areas with one tool set, and the nano glass removes stress marks while restoring the plastic's original color.

    Hard Plastic Nano Files

    Hard Plastic Nano Files