Making auto parts with fiberglass

If you want to design and build new pieces of body for your car, the fiberglass can be the simplest way to do it. When the pieces of fiberglass are properly constructed using multiple layers of glass sheets covered laminated resin, they are resistant to replace their counterparts in steel. Fiberglass can be used to build new body panels or bumpers, covers things like speakers or stylish spoilers to mount on the hood or trunk.


  1. Measure the area of ​​the vehicle where the part will join. Take the dimensions on the car bumpers, fenders, hood and trunk. Even if you are replacing a current part, you will not need such measures for mountain parts, like side panels or a spoiler.
  2. Design aspect of the bodywork, the shape and dimensions. Draw and make a sketch of your design on paper. Converts these drawings to 3D visual animation if you own animation software on your computer. Write the exact measures, ensuring that the measures fit the car.
  3. Create a mold for parts of urethane foam. Cut the large blocks in the form of bodywork parts. To help get the right size for the mold, make the greatest than it should be and reduces or sand the way where it will cut fiberglass.
  4. Foil wraps around the mold, making sure it is snug. You can spray foam adhesive for sticking paper. Nonstick spray applied to the fiberglass non-stick kitchen.
  5. Spread a sheet of fiberglass on the outside of the mold if you’re doing a piece of bodywork. For a ride on another piece cover the entire mold with fiberglass. Apply a resin layer laminated to the sheet of fiberglass and wait for it to dry.
  6. Remove the fiberglass mold if not completely rolled. Be careful when you take it off, because a fiberglass sheet is very fragile.
  7. Reinforces the bodywork part with more sheets of fiberglass, applying a laminating resin over the surface and extending above another sheet. For a part where you have removed the mold, apply extra fiber glass interior, adding as many sheets as you think you need. For a part where the mold is completely wound, add a couple more films around the outer surface.
  8. Also with each glass fiber sheet applied ensure that are no air bubbles. A hand roller will help you do it.
  9. The surface of the make details on the bodywork part when finished. Apply primer to the entire surface before painting, and then apply multiple layers of paint. When the paint is dry, the piece is ready to join the car.

Tips & Warnings

Protect provided with a mask when sanding objects, especially foam or other plastics, as emitting particles are very dangerous.