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Fiberglass Resin Jelly (my experience) to repair rust in my car

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Published on Nov 13, 2010

I have used fiberglass resin in the past to repair rust holes in my car, these are common around the wheels, in truck cabs and other areas where road salt is a problem.

I tried this new product from Bondo (a 3M company) called Fiberglass Resin Jelly. This product was very difficult to use with the fiberglass cloth and I do not think you can use it with the fiberglass mat because it is a thick cream and almost a paste. I had to butter the fabric on both sides and the working time was less than five minutes, I think I was wasting more fiberglass resin jelly than I was using. I found that the fiberglass resin jelly can be sanded in less than an hour.

I am using the jelly formula as a base of my repair and will be using the liquid fiberglass resin to topcoat the repair with at least two more layers and most likely four to five layers in the largest repair area to have a strong repair.

This repair will last longer than the car if the bad metal is removed, otherwise the rust will continue to grow under the fiberglass resin. This is a reasonable solution for rusted body panels on your car. Some people say that welding new metal into your car is the proper way to fix it. Keep in mind that cars are disposable and have no value beyond Kelly Blue Book, I found this out after my car was in a wreck and Progressive offered me less than what it would cost to get another car in reasonable running condition.

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