How to Make RC Car Molding

Written by larryp
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How to Make RC Car Molding
Show off a unique creation by moulding your own RC car shell. (rc - modell image by andreas from

RC cars have long been a favourite pastime of children and adults alike. There's a large range of cars, trucks, boats and planes to choose from, but ultimately there's a smaller number of designs. If you purchased your RC model from a retailer, chances are someone else has the same model. To make your car unique, create a custom shell for your RC car.

Skill level:

Things you need

  • Block of wood, wax or clay.
  • Carving tools
  • Plaster
  • Saw
  • Plastic to melt
  • Receptacle to melt plastic in
  • Clamps
  • Sandpaper

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  1. 1

    Carve wood, wax or clay with carving tools into the exact model you wish to use. Be sure to put all the details you want in this version as it will be duplicated exactly.

  2. 2

    Wrap plaster entirely around the mould. Use the plaster as directed by the instructions. Press down on it so that the plaster can absorb each individual detail of the model.

  3. 3

    Wait for plaster to set. The time will be dictated by the directions on the plaster you choose, but 45 minutes should be plenty of time.

  4. 4

    Cut the mould from the plaster using a saw. Try to cut this as close to the middle as possible, this will make pouring the molten plastic into the mould easier.

  5. 5

    Melt plastic until it's completely liquid. The plastic should have specifications on how much heat is needed for this.

  6. 6

    Pour plastic into one half of the mould. Pour only between one-quarter and one-third full for just enough plastic to coat the outside liberally enough to have a solid shell.

  7. 7

    Clamp the edges of the mould shut. This will prevent the plastic from spilling out.

  8. 8

    Rotate the mould slowly, continuously and evenly. Do this by hand or use any other method that can do so smoothly and allow the specified time to pass as indicated by the instructions with the plastic. Given the amount of plastic it shouldn't take more than 15 minutes.

  9. 9

    Remove the casting from the mould. Sand it down, cut it and paint it to finish the customised RC car shell.

Tips and warnings

  • Use caution when using carving tools.
  • Use caution when working with heat and molten plastic.

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