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Corvette Fiberglass Repair - Plastic Surgery

Giving Your Corvette's Bodywork A Facelift Can Be Easier Than You Think

Steve Temple Jan 13, 2011
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Since Corvette bodies are made of a different material than most other production cars, repairing minor damage can require alternative materials and techniques. While fiberglass and SMC (Sheet Molded Compound, which is found on later models) have the advantage of being rustproof, such composites are subject to their own sets of problems. These range from crazing (also called "spider webbing") to cracking, usually from a slight impact. More-severe or widespread body damage may require the complete replacement of large components-a job best left to a pro-so we'll limit our focus to minor damage that can be repaired right in your own driveway.

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We'll start with slight surface imperfections. If polishing and waxing isn't producing the smooth finish you'd like to see on your beloved Corvette, consider using 3M Scratch Remover, which is designed to minimize defects that don't penetrate the clearcoat (assuming your vehicle has a two-part urethane paint). This product is fairly simple to use, requiring only three separate steps and a common household drill. We tried the 3M product on a C5 that had a few scratches on it, and they all but disappeared.

For cracks or crazing (the latter is usually seen on older fiberglass bodies), a type of adhesive called Plastex can repair a wide range of materials. In addition to fixing fiberglass or SMC, it can be used to fabricate small components, or even repair metal (using a slightly different version of the repair kit).

The inventor of Plastex, Tim Lewis of G.T. Motorsports, has some pretty impressive credentials in chemical engineering. In addition to being trained at the Northrop Institute of Technology, he's worked on the adhesive tiles used on NASA's space shuttle, and he served as manager of Harrah's car collection. So he knows his way around composite materials and how to take care of fine automobiles.

Using Plastex is a straightforward process, easier than working with resin and fiberglass. Unlike conventional resin and catalyst, for most repairs the mixing ratio doesn't have to be in precise proportions, as long as the powder is thoroughly saturated. Depending on the type of damage, Plastex powder can be used with or without the cloth included in the kit. It dries very quickly in a variety of weather conditions, so you can sand it and prep for paint in short order.


3M Automotive Aftermarket Division
G.T. Motorsports/Plastex Plastic Repair Kits



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