i have a bondo f/g repair kit with the cloth and resin and all... how do i fix this?

 

My first suggestion would be to get a book on fiberglas repair.

 

Fiberglass repair is not a terribly difficult job. What is more difficult is to wind up with a finish product that doesn't yell out to everyone that it is a repair.

IIRC, Eckler's has a fairly decent intro for glass repair. The gist of it is to sand the damaged area, front and back, and wide enough to get a good clean bond. When You have at least 4-6" inches of clean glass on either side of the tear, to bond to, wipe it down with lacquer thinner to remove and contaminants. I would recommend NOT using the fiberglass cloth that is woven, using instead the sheets that look like strands or strings bonded together. Make yourself a backing plate so that you can work on the front of the spoiler. Clamp this backing plate over the rear of the spoiler and then read all of the directions on mixing the resin and hardener. Make sure you have all of your tools handy and then put on some disposable rubber gloves, the hospital examination kind. You know - "turn your head and cough". Rip the glass mat to approximately the correct shape and then mix the resin and hardener. Use a disposable glue glove and dab the resin mix onto the damaged glass. Lay a small piece of glass onto the resin and dab it into place. Keep dipping your glue brush into the resin mix and dabbing it onto the cloth until you get good saturation and no air bubbles are visible. The glass takes on a different look when it is sitting flush without any air under it. Let the first layer dry and clean your brush with lacquer thinnger. Keep applying layers until you have built up the front appropriately. I like to sand/grind the front to a more or less finished but rough look and then move the backing plate to the front. Repeat the steps for the back until you have it all built up and then sanded to the correct shape.

The final step takes much more time to get a finished product. You will need to sand the repair until you get a great looking finish. Then, when you are absolutely happy with the finished product, you need to put a glazing coat over the glass repair. That gets sanded smooth too. Finally, paint. IIRC, doesn't that car have a detachable chin spoiler that should hide some of the damage?

Remember, these are very rough directions.

Gary

 

once you have the layers built up you can finsh filling with body filler or I like to use Marglass short strand fiberglass. Pinholes can be filled with a glazing compound like Evercoat's glaze coat. This works very well and sands easy. Then primer and paint

It sounds so easy when you write it?!!!

 

Hey, I had to build a similar section on mine, only on the drivers side. I basically did what was mentioned above, and it turned out pretty good. I used a wooden paint stick as the support to start the build up, then just broke it off when I was done with it. Good luck.