Spoilers are rear attachments, or "wings," on performance vehicles that provide the much-needed downdraft to keep them on the road during races. Spoilers are now relatively commonplace on even the most docile of street vehicles, both for their styling and perceived performance enhancement. Aftermarket spoilers can be pricey--and sometimes making your own aftermarket car accessory can prove disastrous. However, with the proper materials and a bit of patience, you should be able to build a rear spoiler that will blend in well and even enhance your car's styling.
Spoilers come in all sorts of shapes and sizes, so drafting up your own should come fairly easily.
Lay the balsum wood on a clean, flat surface and draw your spoiler design out with a pencil. Use the craft knife to score the edges and eventually cut the design out of the wood. Mix up the fiberglass epoxy and cut some of the fiber strips to fit your design.
Dip the fiberglass strips in the epoxy and then spread them evenly across the Balsum wood wing. Spread at least three layers of fiberglass over the entire surface of the wing and allow to dry completely.
Cut two small triangles out of the sheet metal with the shears, and then bend the top corner at a 90-degree angle and the lower full side in the opposite direction, also at 90-degree angles. This will provide a flat surface on which to bolt the wing and trunk lid.
Bolt the spoiler stands onto the wing and then either paint the wing or mount it as is by bolting the flat portions of the triangles to the top of your car's trunk lid.
