How to rustproof a boat trailer

This blog post will answer the question, “How to rustproof a boat trailer?” and covers the topics like different ways to rustproof a boat trailer, a few simple steps to remove rust, and frequently asked questions related to the topic.

How to rustproof a boat trailer

A boat trailer can be made rustproof by the following means:

  • A boat trailer can be kept from corrosion by wiping it with clean water after each usage.
  • And lubricating the sensitive areas on the trailer on a constant schedule (if necessary). 
  • When used in seawater, wash a trailer with a solution of salt and water.
  • Examine the trailer every two weeks or once a month to be sure that all the parts are rust-free and working properly.
  • Some parts of the trailer are more susceptible to rust including bolts, nuts, leaf springs breakers, and bearings.
  • These parts, which act as couplings to the boat trailer, must be completely protected. 

To keep your boat trailers from rusting, follow these steps:

  • Before entering the water, lubricate the trailer.
  • While cleaning your boat, keep salt and other contaminants at bay.
  • Allow the trailer to dry and lubricate it (again).

Now I will elaborate on the guidance given above.

Before entering the water, lubricate the trailer:

How lubricants work:

  • Lubricants will lubricate the trailer surface areas, avoiding rust by inhibiting water from reacting (passing) across them. 
  • To assure that the lubricant works properly, clean all areas of the trailer before spraying it (ensure everything is dry).
  • Sprinkle the lubricant anywhere you want it: on the leaf springs, bolts, nuts, and wheel bearings, brakes, and so on. 
  • You don’t have to sprinkle on top of the lubricant if it was applied before and some lubrication is left (existing) on the surfaces. 

Here are some of the top-recommended lubricants:

corrosionX HD

Avoid over lubrication:

  • The point is simple: oil the boat trailer parts if they aren’t adequately greased; otherwise, don’t grease them. 
  • Heavy lubrication might collect dust and detract from the appearance of your trailer. So, don’t grease them too much, or at the very least wipe them before lubricating.

While cleaning your boat, keep salt and other contaminants at bay:

You have certainly heard before that wash your boat with freshwater rather than just water after every round. If your boat trailer is submerged in saltwater then wash it with specific products including SaltX, Salt away, and CRC salt terminator.

Products Needed
Salt away
CRC salt terminator

These chemicals eliminate all salt particles trapped on the boat trailer and establish a protective barrier to avoid further corrosion.

Why cleaning boat trailer is necessary: 

  • It’s critical to wash and sanitize the boat trailer with freshwater resources after each voyage to avoid rust. 
  • If you are boating in salt waters on a regular or biweekly basis, utilizing salt away or similar items is also advised. 
  • Using those products isn’t necessary if you are washing your boat trailer regularly.

Allow the trailer to get dry and grease it once more:

  • The lubricants will grease the trailer surfaces and do not allow water to pass through their surface that resulting in inhibiting corrosion. 
  • After washing the boat trailer do not directly apply any lubricant because the mixture of moisture and lubricant can trap dust. 
  • Please give sufficient time to dry the boat trailer after washing, and then use lubrication mists (if required) on all the components of the boat trailer. 
  • In this way,  the lubricant will effectively lubricate those components.

Because all of these products will run away with time, you must check and re-apply them on a regular basis. Cleaning the greased surfaces will quickly remove the lubes. Above all, use them on dry surfaces (parts) rather than damp ones.

How do you get rust from a boat trailer?

Even after taking all precautions, your boat trailer may develop rust. We’ll now look at how to fully cleanse and erase rust from your boat trailer. 

By following the guidance below you can get rust from your boat trailer:

  • Using a scrub brush, scrape the rusty areas.
  • Apply the paint to the trailer after it has been well cleaned (if needed).
  • Sprays of lubricant (lube).
  • Cleaning solutions.

Using a scrub brush, scrape the rusty areas:


  • Make sure the trailer is dried, not wet, before beginning the operation. The operation is simplified by using a dry trailer. 
  • Apply a wire brush to the rusty area and scrub it clean.
  • Alternatively, if you’ve got a drill, you can scrape the corroded trailer pieces with a wire brush for the drill. 
  • The mix of the two would be very effective. The drill will clear the corroded areas rapidly, and a handy wire brush will get where the drill can’t.

If you don’t want to harm the paint of the boat trailer, you can jet wash and let it dry before applying lubricants to the essential locations.

Required Things
Wire brush for drill

Apply the paint to the trailer after it has been well cleaned (if needed):


  • After you’ve cleaned all of the rusty spots thoroughly, it’s necessary to clean the trailer. 
  • Start washing the places you’ve scraped with a sprayer or power washer. 
  • Before spraying anything (paint) to the boat trailer, make sure all of it is spotless.
  • After that, wait patiently a while and let it dry. 
  • Any lubrication or paint applied to a damp area will ultimately fail. 
  • As a result, allow the boat trailer to fully dry. 
  • Apply appropriate paint on your boat trailer depending on the kind of trailer.

More significantly, don’t put regular paint on the boat trailer because it would only preserve the paint externally, allowing water to move through that and corrode the boat trailer from inside. The trailer will appear to be in great condition on the outside, but it may be in a deplorable state on the inside. Ordinary acrylics are a big no.

Here are some top recommended paints:

POR-15 Rust Preventive Paint
POR-15 45904 Top Coat Chassis Black Paint

Sprays of lubricant (lube):

Lubricants are helpful in preventing corrosion from boat trailers. 

Some best lubricants I have found are given below:


  • CorrosionX is an excellent lube for corrosion protection on your boat trailer (particularly on the coil springs).
  • And a good layer would last for many journeys before washing away. For the amount you’re investing, it’s well worth it.


WD40 is a lube that absorbs all water and functions as corrosion protection to keep corrosive materials from rusting. They’re most commonly used on connectors.

Cleaning solutions:

Cleaning solutions are the best choice to remove rust from boat trailers.

Some cleaning solutions are described below:

It is often used to eliminate all of the salt granules that have accumulated on the trailer’s exterior, as well as used to clean (flush) the boat motor.

It is just like salt away, sanitizes and preserves anything that has been subjected to salt by disintegrating the salt that has gathered.

You’ll need to have a tiny sprayer attached to the pump if you’re going to use salt away or CRC salt terminator, so you can transfer the solution into the sprayer and sprinkle it on the trailer.

Few Simple Steps To Remove Rust From Boat Trailer:

  • Cleaning the trailer is a must.
  • Analyze the trailer.
  • Make a decision on a course of action.
  • On the exterior, touch up the paint.
  • On the inside, apply rust prevention.
  • Wash the outer surface after several days.

I will now elaborate on the guidance given above.

Cleaning the trailer is a must:

Steps to clean boat trailer:

  • Clean outer surface thoroughly. Wipe off the dust with a decent brush when you’re doing this by hand. 
  • It’s generally easier to remove off the large pieces of filth beneath while they’re dried, then rinse the remaining off. 
  • Pay special attention to the corners where dirt and moisture can accumulate. 
  • Scratch off of the damaged chunks of paint if it’s peeling underneath. Allow time for it to dry completely.

Analyze the trailer:

Examine the corrosion damages and the metal plates for any fractures. This indicates a structural flaw. If you’re a decent technician, you can probably fix the fractures yourself if they’re little.

Make a decision on a course of action:

  • If there is the destruction that you believe may pose a potential hazard and you are unable to fix it effectively, seek professional guidance. 
  • You could do it alone if the loss is little and you still have some energy. Wear the proper protective gloves, helmets, and spectacles as required, as with any task of this nature. 
  • The majority of the items on this list are simple to work with, but if you’re allergic, make absolutely sure to safeguard yourself and others.

On the exterior, touch up the paint:

  • A good rust paint works well enough for retouching old paint and rusty areas, and it’s simple to use. 
  • Sprinkle a small amount on and leave it to dry completely. When the paint dries, it changes the color. 
  • If something doesn’t blend, try coloring it with a touch of another hue, such as dark, orange, blues, or hot pink.
  • Primers are not required here because rust paints are designed to attach to rust, priming is rarely required.

On the inside, apply rust prevention:

  • Once the dust and grime have been cleared out of the interior, all of the filth and dampness can be seen.
  •  After cleaning primer is applied and then caulking is done.
  • Caulking would not stay intact along the inside of trailers if the steel is all rusted unless the steel is properly painted first.
  • For most people, this is an excessive amount of effort. For all of this, decent rust preventative like Rust Check will suffice.

Wash the outer surface after several days:

Rust Check dribbles will be all over the place, so fetch an old motor washing brush and clean them up. Don’t go overboard with the high-pressure hose and remove all of the Rust Check inside too, or be overly rough with the paint touch-ups.

Frequently Asked Questions(FAQs): How to rustproof a boat trailer?

How to prevent rust and corrosion from spreading on the boat?

Rust can be removed in several ways. Two are described below:

  • After each use, wipe down your boat trailer with freshwater resources. You are removing the saline filth that would contribute to further rusting by doing so.
  • Whittle down the rust with a stiff brush and wipe with water.

How can I get rid of rust on my trailer?

You can get rid of rust by following ways:

  • We can apply the paint without removing the old rust while using the Metal Ready Primer. 
  • After the paint has dried, smooth it with 400 sandpaper, prime it, then paint it again. This is preferable to galvanizing since zinc could still corrode.

How often should you re-coat a rust-proof trailer?

  • Apply a few layers of lanolin after you’ve applied a few heavy coats of icy gal. 
  • This will sink into the porous matrix of the cold gal, making it moisture resistant – the water will beads up and roll over like a freshly painted automobile. 
  • After one year, recoat the lanolin.

Will a galvanized trailer rust?

  • Because of their exceptional resistance to corrosion, galvanized trailers are ideal for usage in saline water. 
  • Rather than just the outside painted surfaces, the trailer is coated on all sides (inside and out).

What kind of trailer do I need for saltwater?

Trailers made of aluminum


  • Aluminum trailers are lightweight and the best option for marine application. 
  • Keep in mind that even aluminum trailers feature steel connectors, tongues, winch posts, bearings, shocks, and other metal parts because of their durability.

What is the best homemade rust remover?

  • Rust interacts with vinegar and eventually disappears. 
  • Merely immerse the rusted object in white vinegar for several hours before wiping the rust away.


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