How to Repair a Dent in Your Car With Filler, diy auto repair.#Diy #auto #repair


How to Repair a Dent in Your Car With Filler

Diy auto repair

Sometimes your car will receive a dent or gouge that s too small to justify the expense of a professional repair but too big to simply ignore. You can cut your repair costs by doing the body work yourself. You ll need body filler, sometimes called Bondo (the most popular brand), which is a durable plastic resin that can be shaped and sanded. You ll also need the following supplies:

  • Sandpaper: 150 grit, 220 grit, 400 grit wet/dry
  • Rubber sandpaper block
  • Body filler (with hardener, usually included)
  • Glazing and spot putty
  • Rigid plastic spreader
  • Flexible plastic spreader
  • Automotive primer
  • Work gloves, safety goggles, mask
  • Spray bottle filled with water

You ll also need to block off several hours of time. Repairing your bumper is a time-consuming process that requires patience.

Prepare the Surface

Diy auto repair

Body filler doesn t stick well to paint, so you ll need to sand the damaged area down to bare metal in order for the Bondo to work. For this job, you can use a heavier sandpaper, like a 150-grit. Regardless of how large the actual damage is, you must remove at least 3 inches beyond the dent.

In this example, you ll see some small circles on the surface. Sometimes it s a good idea, especially if you are dealing with multiple dents, to mark the location of the damage so that you know where to focus your repair easily. You should also note that the pictured body panel has evidence of an old repair on it (the beige-colored areas are old body filler).

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Mix the Body Filler

Diy auto repair

Body filler is a two-part epoxy that must be mixed before use. It consists of a creme hardener and a base filler. Once you mix the two, the filler will harden in less than 5 minutes, so you ll need to work quickly and carefully. You can mix the hardener on any clean, smooth surface that is disposable. Follow the directions on the filler can to mix the proper amount of hardener with filler. Mix the two using a rigid plastic spreader.

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Apply the Filler

Diy auto repair

Using a flexible plastic spreader, spread filler in an area at least 3 inches outside of the actual damage. You ll need the extra space to properly smooth and feather the hardened filler. Don t worry about being too neat with it. You ll be sanding away any imperfections once the filler hardens.

Diy auto repair

Once the filler has completely hardened, you re ready to start sanding. With your sandpaper wrapped around a sanding block (rubber sanding blocks are best and can be purchased in automotive or home repair stores), start sanding the filler using 150-grit sandpaper. Sand lightly and evenly over the entire surface of the repair with broad circular strokes. Sand past the edge of the filler to create a smooth transition.

When the filler is pretty close to smooth, switch to the 220-grit paper and continue until it s even. It s not unusual to miss a spot or realize there are some gaps or pits in your filler. If this is the case, mix a new batch of filler and repeat the process until it s smooth. You ll sand away most of the filler, leaving the dent filled and a smooth transition between metal and filler.

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Glaze

Diy auto repair

Spot putty is another version of filler, but much finer and easier to sand. It doesn t need to be mixed and can be applied directly from the tube to the repair. The spot putty fills in any tiny impressions in the filler. Smooth (or glaze) spot putty across the repair surface with a flexible plastic spreader. It dries faster than the body filler, but be sure you give it enough time before you begin to sand it.


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