For “mods” in a crafting / model‑making context, the most commonly used material is plastic , especially polystyrene or PVC sheets and parts, because it is light, easy to cut, and takes paint well.

Quick Scoop

  • Plastic (polystyrene, PVC, acrylic) is widely used for modern model kits, custom pieces, and many hobby “mods” because it’s cheap, easy to shape, and bonds with simple glues.
  • Wood (basswood, balsa, birch plywood, MDF) is also very popular, especially for architectural or dollhouse‑style models and DIY miniature “mod” builds.
  • Resin appears a lot in upgraded or third‑party “mod” parts because it captures fine detail better than standard plastic, though it’s more brittle.
  • Metal (often pewter or similar alloys) is common for collectible or high‑end miniature “mods,” where weight and durability matter.

Tiny example

Imagine someone “modding” a miniature house kit:
They might rebuild walls from thin plywood or MDF, add plastic window frames from styrene strips, cast tiny resin accessories, and finish with metal detail pieces like railings.

Bottom note: Information gathered from public forums or data available on the internet and portrayed here.