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Beginner tips · October 20, 2026 · 2 min read

10 Gunpla mistakes beginners make (and how to avoid them)

Everyone makes these mistakes on their first kits. Knowing them in advance saves parts, stickers and frustration.

  1. Cutting parts flush on the first cut. Cut a few millimetres away from the part first, then trim the rest. A flush first cut leaves white stress marks.
  2. Twisting parts off the runner. Except for Entry Grade kits designed for it, always use cutters. Twisting can tear the plastic.
  3. Cutting every part at once. Cut only the parts for the current step. Many pieces look alike and runners have letter and number labels for a reason.
  4. Ignoring the part codes in the manual. A code like B-12 means runner B, part 12. Check both before cutting.
  5. Pressing parts together at an angle. Line up the pegs and press straight. Forcing a crooked fit can snap a peg.
  6. Building both arms on the wrong side. Manuals often show left and right parts that are mirror images. Check the diagram before closing them up.
  7. Peeling stickers with fingers. Use tweezers or the tip of a hobby knife. Oils from your skin weaken the glue.
  8. Using a dull blade. A dull knife tears plastic instead of shaving it. Blades are cheap; change them often.
  9. Working on a cluttered table. Small parts vanish. A cutting mat and a small tray or bowl solve this.
  10. Starting with a kit that's too hard. A Perfect Grade or Real Grade as a first kit is a common way to quit the hobby. Start with an HG.

Already snapped two parts together by mistake? A parts separator or a flat plastic tool slipped into the seam will open them without scratches.