How To Repair A Fiberglass Motorhome Bumper

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Fiberglass bumpers are important rubber devices designed to protect your vehicle from damage. Because they do this by absorbing shocks and impacts, you lot may need to repair your bumper every one time in a while. Thankfully, the repair process is incredibly straightforward, and doing it at home can aid you save hundreds of dollars on labor.

1. one

   Disable the airbag if you're removing the front end bumper. To avoid accidentally setting off the airbag, you lot'll need to disable it before starting the front bumper removal procedure. To exercise so, open up the hood of your car and disconnect the battery, negative side offset. Then, pop off the steering wheel cover by pressing the wheel'south squirt push button with a specialty removal tool. Within, look for a minor power box, accept out the screws or bolts holding it in identify, and remove the connected wires, thus disabling the airbag.^[1]

   • If you cannot locate an eject button or power box, check your vehicle's commuter transmission for model-specific instructions.

2. 2

   Take off any screws, nuts, or clips holding the bumper in place. For forepart bumpers, these are typically located straight above the bumper (nether the hood), below information technology, and at the driver and passenger-side ends. For rear bumpers, look below the bumper, on the outer surface, and within the trunk.^[2]

   • To avoid problems when reattaching the bumper, take pictures showing where all the fasteners go.

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3. 3

   Slide the bumper off your car. In one case you've removed all the outside fasteners, gently pull on the left or right side of your bumper until it pops out. Using a screwdriver or other flat object, keep the inside of the bumper any remove whatsoever boosted clips property it in identify. Then, simply slide off the bumper.

   • Depending on the model of car, you may need to accept off other elements, such as fog lights, to fully remove the bumper.

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1. ane

   Grind downwards the raised surface along big cracks. Mountain a apartment grinding head on a handheld die grinder, so use it to remove the surface covering the front and dorsum of large damaged areas. Make sure to grind down any sharp or loose edges forth the cracks. So you can gear up the bumper properly, use the border of the grinder to create a thin, clear groove along each damaged spot.^[iii]

   • Stray fiberglass particles can harm your eyes, lungs, and whatsoever exposed skin. To avoid this, article of clothing thick gloves, long-sleeved clothing, goggles, and a dust mask while working.

2. 2

   Sand downwardly the raised surface along pocket-sized cracks. Unlike big cracks, small damaged areas may exist difficult to grind without further dissentious the bumper. To get effectually this, sand the areas down using 600 grit wet and dry sandpaper. Wait for this specialty sandpaper at an auto repair, dwelling comeback, or hardware store.^[iv]

3. iii

   Scrub the fiberglass surface with acetone. Acetone is a highly volatile chemical that serves as a corking dirt and grease remover. When applied to your fiberglass bumper, it will remove pre-existing resin and so your new materials have a surface to bond with. To strip the surface properly, advisedly dampen a rag with acetone, and so scrub it over every damaged spot.^[5]

   • Acetone is highly flammable, then keep it abroad from burn and the combustion engine of your car. For safety, wear long-sleeved dress, safety gloves, and safety goggles when using information technology.

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1. 1

   Purchase resin, hardener, and textile matting strips. To repair your bumper, you will need fiberglass resin, fiberglass matting strips, and a liquid hardening amanuensis, along with plastic or wooden sticks to help mix the resin and a brush or other applicator to put it on the bumper. You can purchase these separately or in pre-packaged fiberglass repair kits. Look for the materials at auto supply stores.^[vi]

2. 2

   Cut the fiberglass matting to the size of each cracked area. Grab your cloth matting and hold it up to a damaged area. Using a fabric marking, make a line on top of the cloth indicating the crack placement. Then, accept your cloth to a solid working table and cut it using a precision knife. And so yous have enough overlap to support the fiberglass, exit most 20 mm (0.79 in) of space around the marked area. Repeat this with each crack.^[seven]

3. 3

   Mix the resin and hardener together. Grab a small-scale container and pour in the amount of resin you think yous'll need to comprehend a specific piece of fiberglass matting. Then, check the instructions on the dorsum of your resin container and use the recommended amount of hardening agent. Using a plastic or wooden stick, stir the substances together until they are well mixed.^[viii]

   • Once combined, most resin mixes stay soft for 8 to 12 minutes, afterward which they become unusable.

4. four

   Apply the matting to your bumper using the resin mix. Cover the back of a damaged area with a sheet of fiberglass matting. Using a castor or other applicator, comprehend the entirety of the fabric and about two.v inches (6.iv cm) of the surrounding expanse with the resin mix. Echo this with each crack, and so permit the matting cure in a moderately warm area for most 2 hours.^[9]

   • For extremely large cracks, you may need to apply matting to the front of the bumper besides.

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1. 1

   Sand down the repaired areas. One time the fiberglass is fully cured, sand down the fixed areas using 600 grit wet and dry out sandpaper. Practise this on both sides of the bumper until the fiberglass patches are smooth to the touch. To avert breaking open the new seals, do not use your handheld grinder.^[10]

2. ii

   Encompass the fixed areas with car body filler if necessary. If there are still cracks or grooves in the bumper afterwards the initial sanding, you can fix them with body filler. Estimate how much torso filler you demand and squeeze it into a pocket-size cup. Mix in the amount of hardening agent recommended on the body filler container, so apply information technology to the cracks with a plastic squeegee. Shine the surface if necessary, then allow it cure in the sun for about xv minutes.^[11]

3. 3

   Sand down the entire bumper. Once you've successfully filled all the damaged areas, sand the entire bumper down with 600 grit moisture and dry out sandpaper. The goal is to get every bit compatible a coat as possible, with no random hills caused past the fiberglass strips or trunk filler.^[12]

4. iv

   Repaint the bumper (optional). If you're non happy with how the bumper looks, try painting it to hide the repairs. Embrace the bumper with a base coat of white spray pigment, then let it sit for well-nigh x minutes. Apply base coats until yous tin can no longer see the repairs, so spray pigment the bumper a similar color to your car. Permit the paint dry for one to 2 hours, then spray it with a layer of articulate coat. Your bumper should exist gear up after 24 hours.^[13]

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1. one

   Slide the bumper onto your car. Make sure the bumper is completely dry. Then, lift it upwardly and slide it over the front or rear end of your machine. In one case you have it in place, push the bumper forward until information technology tin can sit down on its own. Starting on the left or right side, walk around the automobile and push every section of the bumper in until it is flush confronting the vehicle.

2. two

   Replace and tighten whatever bumper fasteners. To continue the bumper from coming off, supervene upon any screws, nuts, or clips needed to hold it in identify. Then, make sure to secure the fasteners with a screwdriver or wrench until they're tight enough that you can no longer motion the tool.^[fourteen]

3. 3

   Reconnect the airbag if necessary. If you disabled the airbag, make sure to reattach it before driving your vehicle. To do so, connect the steering wheel power cords to the power box, then replace any screws or nuts designed to concur the box in place. Put the steering wheel comprehend dorsum on, then reconnect your car's battery cords, positive side showtime.^[15]

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Things Y'all'll Need

• Screwdriver or wrench (for bumper removal)
• Steering bicycle removal tool (to disable airbag)
• Handheld die grinder with flat grinding caput
• 600 dust wet and dry sandpaper
• Acetone
• Cloth rag
• Fiberglass resin
• Fiberglass matting strips
• Liquid hardening agent
• Cloth marking
• Precision knife
• Plastic or wooden mixing stick
• Castor or other liquid applicator
• Body filler (optional)
• Plastic squeegee (optional)
• Spray paint (optional)

About This Article

Commodity Summary 10

To repair a fiberglass bumper, get-go remove the fasteners holding the bumper in place, and so slide the bumper off your car. To make clean the bumper, strip the surface from large cracks using a die grinder, sand downwardly small cracks with 600 grit wet and dry sandpaper, and scrub the whole bumper with acetone. Using a precision knife, cut out strips of fiberglass matting the same size equally your cracks. Then, ready them to the dorsum of the bumper using a mixture of fiberglass resin and a hardening agent. For tips on repainting your bumper, read on!

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Source: https://www.wikihow.com/Repair-a-Fiberglass-Bumper

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