How to make Auto glass fiber parts

If you are looking for the design and construction of new body parts for your car, fiberglass can be the simplest way to do it. When fiberglass parts are built right, use multiple layers of laminated resin-coated glass sheets, which are substitutes resistant to their steel counterparts. Fiberglass can be used for the construction of new body panels or bumpers, enclosures for things like a loudspeaker, or elegant spoilers for mounting on the bonnet or trunk.


  • Measure the area in the vehicle where the piece will be placed. Finish with the dimensions of the automobile bumper values, mudguards, bonnet and boot. Even if you are not replacing an actual part of the body, you still need these measurements of parts you can assemble in the car, just like side panels or a spoiler.
  • The design of the body part look, the shape and the dimensions. Draw and sketch your designs on paper. Convert these drawings to visual 3D animation if you have animation software on your computer. Write down the exact dimensions and measurements, making sure they fit with the car measurements you took earlier.
  • Create a mold for the parts of the body outside the urethane foam. Cut the large foam blocks in the shape of the body part. To help the mold to its correct size, make the largest cut that is and must gradually reduce or sand down to the shape the fiberglass is placed on.
  • Wrap the foil around the mold, making sure it is well wrapped. You can spray adhesive on the foam so the foil will stick. Apply cooking spray to the outside of the sheet so the fiberglass will not stick.
  • Place a sheet of fiberglass over the outside of the mold if you are making an actual part of the body. On the one hand is mounting elsewhere, cover the entire mold in fiberglass. Apply a layer of laminate resin to the fiberglass sheet and wait for it to dry.
  • Remove the fiberglass from the mold if it is not completely wrapped around it. Be very careful when you remove it, as a sheet of fiberglass itself is very fragile.
  • Reinforce the part of the body with more sheets of fiberglass, the application of more laminate resin to the surface and, for another sheet in it. For a part where the mold was extracted, apply the extra fiberglass to the inside of the piece, adding as many sheets as you think is needed. For a part where the mold is completely wrapped, add a couple of more sheets along the entire outer surface.
  • Smooth each sheet of fiberglass as you apply it to make sure there are no air bubbles. A hand roller will help you do this.
  • Paint and detail the body part once it is finished. Apply primer to the entire surface before the actual paint itself, then apply multiple coats of paint in uniform and level stripes. Once the paint is dry, the part is ready to be attached to the car.

Tips and warnings

  • Always protect yourself with a breathing mask when sanding objects, especially foam or other plastics, as the particles they emit are very dangerous.