- 1). Begin by removing your rear spoiler from your trunk lid. Lay the spoiler feet down on the cardboard and use the marker to trace around the feet. This will become your pattern for the spoiler risers. Mix up some Bondo putty and let it harden.
- 2). Spread a layer of putty onto the cardboard pattern when the Bondo is the consistency of peanut butter. Build a layer 2 to 3 inches deep of putty and use the putty knifes to shape the riser to resemble the foot of your rear spoiler. This does not have to be exact as you will shape it later, but try to get it close.
- 3). Allow the putty to dry until tacky and then spread another 2- to 3-inch layer of putty on top of it. Continue this process until the desired height has been reached. Allow the putty to dry until completely hard (24 to 48 hours). Using the band saw, shape the sides of the putty to more closely resemble your spoiler foot. Fine tune the design with the razor blade knife and sandpaper. After thoroughly cleaning the riser of any dust or dirt, paint with the appropriate color of car paint, drill holes for the spoiler mounting bolts to go through, and mount the rear spoiler on top of the risers.
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