How to patch rust holes on a truck

This blog post will answer the question, “How to patch rust holes on a truck” and cover topics like how to fix rust holes in a truck, tips to prevent rust on trucks, and frequently asked questions.

How to patch rust holes on a truck?

Follow the steps given below to patch rust holes on trucks:

  • Prepare the space.
  • With a wire brush wheel, eliminate the corrosion.
  • Remove any remaining rust with sandpaper.
  • Getting Rid of Dust and Sediment
  • Use a corrosion remover or a rust restorer that is chemically based.
  • Paint the truck bed and weld any additional patches.
  • Make use of body fillers.
  • Flatten the patch using sandpaper.

How to fix rust holes on a Truck?

The life of a truck bed is harsh. They are exposed to the outdoors, have objects hurled at them, and are generally battered up while serving as dependable, practical automobiles. As a result, your truck bed may begin to rust years before the body of the vehicle starts to show signs of wear.

In an ideal world, you’d just weld a metal plate over any gaps and be done with it. However, if you don’t know what you’re doing, welding is a risky and difficult job. Hiring a professional to perform it for you is equally costly.

Thankfully, there are a few strategies you may use to repair your damaged truck bed without spending a lot of money. 

Here’s a quick rundown of the procedure:

  • Prepare the Environment
  • With a wire brush wheel, eliminate the corrosion
  • Remove any remaining rust with sandpaper
  • Getting Rid of Dust and Sediment
  • Weld any necessary repairs and repaint the truck bed
  • Make use of body filler
  • Sand the patch to a smooth finish
  • Prime using a primer

Now I will elaborate on the guidance given above:

Prepare the Environment

Preparing the surface and eliminating all of the corrosion is the first step in repairing a corroded truck bed. You’ll only be able to determine the actual degree of the harm after that.

Steps of preparing:

  • Start by masking off any areas that aren’t impacted by the rust. Use many layers of paper or sticky tape for further protection. 
  • For the corrosion removal procedure, you’ll need a scrub brush and some sandpaper, and you don’t want to scratch any of the surrounding regions.
Tools Needed
Scrub Brush

With a wire brush wheel, eliminate the corrosion

After you’ve completely covered the parts of the truck bed that haven’t rusted, start removing the rust using a drill and a wire brush wheel. This is a more aggressive procedure that involves a lot of lube and physical effort, but the aim is to remove the majority of the rust as soon as possible. 

Don’t worry if you break through the bed or expand a gap in the process. You want to keep going until you can’t take any more rust off.

Tools Needed
Wire Wheel

Remove any remaining rust with sandpaper

Steps of removing rust by using sandpaper:

  • After you’ve removed all you can, go over any areas with 80-grit sandpaper to remove any remaining corrosion. 
  • Keep in mind that rust may spread under the surface and harm painted surfaces. 
  • Scrape some paint around the perimeter of the sanded area to confirm that all of the corrosion has been gone.
  • Now sand the area using 150-grit sandpaper to make it smooth. This will aid in the adhesion of paint and patching material.
Materials Needed
80-girt Sandpaper
150-girt Sandpaper

Getting Rid of Dust and Sediment

After you’ve finished sanding, wash the truck bed to eliminate any collected silt and debris, and check the truck bed carefully for any leftover rust. Use a chemical corrosion remover or a rust restorer to get rid of the rust.

You may use a chemical corrosion remover or corrosion restorer to offer an extra layer of assurance that you’ve eliminated all the rust. If you do so, make sure you follow all of the manufacturer’s directions, particularly when it comes to wearing the proper safety gear.

Weld any necessary repairs and repaint the truck bed

After cleaning and drying the truck bed, apply a corrosion prevention primer to any uncovered metal. Apply an even layer, being careful not to miss around the margins of any gaps, as well as the base of the bed where paint may have peeled away.

This is where you would weld a patch in place if you were intending to do so later in the procedure. Body filler, on the other hand, is a safer and more economical option for most individuals.

Make use of body filler

Body filler is a useful material for filling holes left by rust and corrosion. However, before you start mixing the filler, make sure you apply any patching gauze or other substances that are included with your patching kit. 

Steps of applying body filler:

  • After you’ve finished applying the patching mesh, you may start mixing the filler, being sure to follow the product’s directions. 
  • You must carefully follow these directions because if the ratios are off, the filler will solidify too soon or not at all.
  • Similarly, you should be mindful that the filler will start to set as soon as you finish mixing it. 
  • Because the time is ticking, you’ll want to go to work as soon as possible. You should be OK as long as the hole is entirely filled. Fortunately, you don’t have to bother about it appearing attractive just yet.
Material Needed
Body Filler

Sand the patch to a smooth finish

The filler usually takes around 2 hours to completely set, however, this might vary depending on the material. After the filler has solidified, use your 150-grit sandpaper to flatten it out. Use finer grit as you make your way down to the body level to flatten the surface even more.

Prime using a primer

Steps of applying primer:

  • Apply an automobile primer to the repair and any uncovered metal after it has been cleaned out to your approval. 
  • After the primer has dried for approximately an hour, you’ll want to sand the area using 400-grit sandpaper. 
  • Apply a second layer of primer once you’ve finished sanding and let it dry before leveling it out with the same paper.

Here’s the best primer:

Rust-Oleum Rusty Metal Primer (7769502)

Benefits of Rust-Oleum primer:

  • Provides a rust-controlling formula.
  • Provides strong paint and top-coat adherence.
  • Leaves a smooth, one-of-a-kind finish.
  • Simple to use
  • There is no need for dilution or preparation.

How to restore the original finish of a truck?

Follow the steps given below to restore the original finish of a truck:

  • Allow the primer to cure overnight after spraying both layers and leveling up the surface, then wash and dry the truck bed thoroughly. It’s time to repaint the truck bed now that you’ve properly coated it.
  • Apply three coats of paint for optimal effects, sanding with 400-grit sandpaper in between layers, just as you did with the primer. After the third layer is dry, sand the surface flat again, but this time with water on the paper for a more subtle finish.
  • Apply a clear coat to the painted surface after the last application has dried. This layer is tougher than the paint layer and covers the lower layers. It also provides your truck’s bed with a sleek, gleaming look.
  • After the clear coat has dried, take the sticky tape and carefully clean the area. Waxing the area for further safety and esthetic is an option, but it’s not required.

In most circumstances, this kind of repair will last at least 5 years before it has to be touched up again. However, it’s a good idea to examine the repaired area on a regular basis to make sure no new corrosion is accumulating, particularly in the first year.

Materials Needed
Clear Coat

How to prevent rust on trucks?

There are several ways to keep a truck from rusting. If you really want your truck’s chassis and parts to last as long as possible, you’ll need to be cautious and maintain them properly. Though you can’t avoid rust after it’s started, you can manage the early phases of rusting before it completely destroys your truck.

Rust can be prevented from trucks by following the guidance given below:

  • Clean Up Your Vehicle
  • Keep it inside
  • Using an Undercoat

Now I will explain the guidance given above:

Clean Up Your Vehicle:

Maintain the cleanliness of your work vehicle in the same way that you would your personal vehicle. It’s especially crucial if you labor in places with a lot of dust, grit, pebbles, moisture, and other potentially dangerous elements.

Cleaning removes impurities and allows you to search for blemishes. Ensure that the body, substructure, tire wells, and other sensitive areas are all clean.

Keep it inside:

If at all feasible, store your truck in a climate-controlled enclosed space such as a carport or shed, Rainfall, sunlight, cold, frost, and salts are all protected by the correct covering. Keeping your truck outside would cause the protecting paint coat to deteriorate, exposing your vehicle to rust.

Using an Undercoat:

Since the bottom is the most prone to corrosion, most manufacturers usually apply a thick shield of sealant on it. Different sealants and methods can aid in the protection of your equipment against rust. One could also choose to do your own bottom coating to preserve your vehicle in good shape.

Corrosion can be prevented by adding an undercoating to the truck’s paint. When sprinkling, make sure there is no humidity on the surface. 

Then, using an anti-rust mist, you may give even more prevention.

Preventative maintenance is your greatest bet for extending the life of your truck. Rather than waiting for corrosion to set in, take the proper measures now to save destruction and costly repairs or restorations.

Materials Needed
Sheet of Sealant
Anti-corrosion Spray

Frequently Asked Questions: (FAQs), “How to patch rust holes on a truck?”

How much does it cost to rust-proof a truck?

How much does it cost to get your automobile rust-proofed? Corrosion proofing might cost anywhere from $90 to $200 in an auto parts store. A few vehicle owners told us that salespeople pushed customers to buy corrosion protection, claiming that if they didn’t, their manufacturing warranty would be voided.

What is the best way to rust-proof a vehicle?

The first thing you should do is get it oiled with a corrosion-proofing spray. Most people think that this is the greatest method because the oil-based fluid can get into each crevice and furrow to provide the most prevention. A heavier sealer mist can also be utilized, but make sure the bottom is properly clean before spraying it.

Are undercoating and rust-proofing worth it?

Your automobile can be protected from corroding by corrosion protection and undercoating it. This is extremely critical for your vehicle’s underside, which is frequently exposed to fluids like water, substances like salts, and other dust particles from the roadway.

Can you undercoat your truck yourself?

A “professionally” sprayed undercoating can cost a lot of money. If you’re anything like me, though, you would rather be doing it yourself if you can. What if I told you there is a simple, cost-effective, long-lasting way of bottom coating that you can perform yourself in one day for around $35.

Should I wash my car before rust-proofing?

In fact, it’s recommended that you first wash your vehicle’s underside with pressurized water to ensure that you don’t rustproof over top of dirt or muck. Just after a few days of rustproofing on a filthy chassis, the paintwork will start coming off.

Do electronic rust modules really work?

While rustproofing your truck is strongly advised, mists and lubricants are usually suggested and have been shown to function over time. To date, there have been no formal studies that suggest vehicles with electronic corrosion proofing have less rust than vehicles without the system.


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