Vehicles are always getting dinged and damaged while in use, or even while left alone in a parking lot. Since the value of the car and the aesthetically pleasing appearance are very important features of a car the vehicle body should be repaired with a body filler. This is applied by a professional to make the dent smooth and a vehicle appear like new again.
Fiberglass
Fiberglass body filler, also called resin, is made with durable polyester plastics, which are found at automotive-parts stores and on the Internet. The car dent is machine-sanded with 36-grit paper to remove rust, then dried completely and kept in a moderately warm area of about 68F. Fiberglass filler is mixed by following the package instructions and is applied in layers over the dent, at a thickness of 1/4 to 3/8 inches with a putty knife. Each layer must cure completely, by applying heat at about 72-degrees F, before the following layer is applied. Fiberglass filler is sculpted and smoothed, layer by layer, to provide the car body with a seamless repair.
Catalyzed Glaze
A catalyzed glaze is often referred to as spot putty, since it is designed to repair small dings and dents in the body of the car. The glaze is prepared with a cream hardener to package specifications, and applied to the area with a body spreader. Once the glaze has sat for about 20 minutes, then the area is sanded with 220-grit sandpaper. Additional layers may be applied where needed, sanding between applications each time. Using a non-catalyzed primer, or solvent for cleaning, may help prevent the finished product from shrinking after drying, which could lead to a visible ring around the spot.
Cellulose Stopper
Using cellulose stopper as a dent-repair filler differs from traditional plastic fillers in the way it is prepared. The dent, which is typically a very minor bump, is sanded with an electric sander and 24-grit paper. The cellulose stopper is applied with a flat-head, hand-held tool, such as a putty knife. The cellulose will dry on its own, without the need for heat, like the previous fillers. The cellulose is sanded once more, with a sheet of very fine sandpaper of about 400-grit, then the car is painted. If additional layers are required for complete coverage, sand between layers with the 400-grit paper.
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