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How to Properly Clean Your Rig After the Beach

Most car owners make this harder than it needs to be. Here's the straightforward approach that actually works—no fluff, no upselling.

Driving on the sand is the best way to spend a weekend, but the salt and grit will eat your car alive if you aren't careful. Here is how to get every grain of sand and salt out before the rust sets in.

MT
Mick Thompson Senior Detailing Editor
| Updated: 5 March 2026
How to Properly Clean Your Rig After the Beach

Aussie Conditions

Australian conditions are tougher than most—intense UV, red dust, coastal salt, and 40°C summers. European car care advice often doesn't cut it here.
Quick Summary

Look, we all love a run up Noosa North Shore or a weekend at Robe, but the cleanup is the part most blokes mess up. Whether you're dealing with fine white sand or that sticky coastal salt spray, just a quick spray at the local DIY wash won't cut it. This guide covers exactly how I clean my own 4WD and my customers' rigs to make sure they don't turn into a bucket of rust in six months.

01

The Reality of Salt and Sand

I've seen some horror stories in my 15 years doing this. I once had a customer bring in a three-year-old LandCruiser that looked mint on top, but when we got it on the hoist, the chassis rails were already scaling. He'd been to Fraser every summer and thought a 'quick squirt' at the servo on the way home was enough. It wasn't. In Australia, especially during March when it's still bloody hot and the UV is pumping, that salt dries onto your paint and into your chassis like concrete. If you leave it, the salt reacts with the metal and the humidity to start the corrosion process almost immediately. Honestly, I reckon the cleanup is just as important as the trip itself. If you don't have the time to clean it properly when you get back, maybe stick to the bitumen. (Just kidding, but seriously, do the work).
02

The Gear You'll Need

What You'll Need

0/9
Pressure Washer — Doesn't have to be a beast, but you need more than just a garden hose.
Underbody Water Broom — One of those things with the wheels. Absolute game changer for the chassis.
Salt Neutralising Solution — I swear by Salt-Away or the Bowden's Own Salt Sifter. Don't skip this.
Snow Foam Cannon — Helps lift the abrasive sand without you scrubbing it into the paint.
Degreaser — A good heavy-duty one for the suspension components.
Microfibre Wash Mitt — Use a cheap one for the lower halves, keep your good one for the bonnet and roof.
Air Compressor or Leaf Blower — Crucial for getting water out of the door mirrors and trim.
Long-reach Brush — For getting behind the wheels and inside the arches.
Two Buckets with Grit Guards — Because sand is basically liquid sandpaper.
03

Before You Start

Tap each step to mark complete
01

Park in the Shade

Never wash a salty car in the direct Aussie sun. The water evaporates too fast, leaving the salt to bake back onto the paint. Find a shady spot or wait until the arvo.

02

Cool the Brakes

Give your rotors a chance to cool down before you blast them with cold water. I've seen mates warp their discs because they were too keen to start washing.

03

Open Everything Up

Pop the bonnet, open the fuel filler flap, and open the tailgate. Sand gets everywhere, and I mean everywhere.

04

The Step-by-Step Deep Clean

Tap each step to mark complete
01

The Dry Blowout

Before you get anything wet, use an air compressor or leaf blower to blow out the loose sand from the window seals, door shuts, and engine bay. If you wet it first, it just turns into mud and hides in the corners.

02

Heavy Underbody Rinse

Chuck your underbody attachment on the pressure washer. Spend a good 20 minutes here. You want to see the water running clear from the chassis rails. If you don't have a water broom, just use the wand, but get right under there. Use a salt neutraliser in your foam cannon and blast the whole underside.

03

Engine Bay Wipe Down

Don't go nuts with the pressure washer here. Use a damp cloth and some APC (All Purpose Cleaner) to wipe away salt spray from the battery terminals and intake. Be careful of the electrical bits, I learned that the hard way on a modern Hilux once.

04

Wheel Arch Deep Clean

Remove the wheels if you're feeling keen, but at least get a brush in there. Scrub the suspension arms and the back of the brake calipers. This is where salt loves to hide and start pitting the metal.

05

Snow Foam Pre-Wash

Cover the whole car in a thick layer of foam. Let it dwell for 5-10 minutes (but don't let it dry!). This encapsulates the sand particles so they slide off without scratching your clear coat.

06

The First Rinse

Rinse from the top down. Pay massive attention to the gutters, the snorkel join, and behind the spare tyre if you've got a rear-mounted one.

07

Two-Bucket Wash

Now go in with your wash mitt. One bucket for soapy water, one for rinsing your mitt. If you feel even a tiny bit of grit in the mitt, rinse it out immediately. (Your paint will thank you).

08

Door Shuts and Seals

Clean the inside of the door frames. Salt spray gets sucked into the door seals while you're driving. If you leave it, it'll rot the bottom of the doors.

09

Final Rinse with Salt Neutraliser

I like to do one final pass with a very diluted salt neutraliser over the whole car, then a quick final rinse with fresh water.

10

The Drying Phase

Use a dedicated drying towel or that leaf blower again. Getting the water out of the lug nuts and window tracks is the only way to stop those annoying run-lines later.

Pro Tip: The Chassis Flush

A trick I use for my own rig: I bought a cheap oscillating garden sprinkler. After the main wash, I chuck it under the middle of the car and let it run for 15 minutes, moving it every now and then. It gets into the spots you can't see and gives the chassis a proper soaking to dissolve any stubborn salt crystals.

Watch Out

Be bloody careful when pressure washing the radiator and intercooler. The fins are soft aluminium and you'll bend them flat if you get too close or use too much pressure. Keep the nozzle at least 30cm back and spray head-on, never at an angle.
05

Protection for Next Time

Once she's clean and dry, don't just park it. I always recommend applying a sacrificial layer of protection. If you've got a ceramic coating, great, but after a beach trip, I like to use a silica-based spray sealant like Gtechniq C2 or even just some Bowden's Bead Machine. It makes the sand blow off much easier on your next trip. Also, check your air filter. Sand and salt air can clog them up faster than you'd reckon. Give it a tap out or replace it if it's looking dodgy. And for the love of god, check your cabin filter too, no one wants to be breathing in dried salt and dust for the next month.

Watch Out

If you've got a roof rack or a rooftop tent, salt gets trapped between the rack and the roof. If you don't rinse this out, you'll end up with rust bubbles around your mounting points. It's a pain to get to, but you've gotta do it.
06

Common Questions

Can't I just go through an automatic car wash?
Absolutely not. Most of them reuse water, and even if they filter it, you're basically sandblasting your car with recycled salt water. Plus, they never get the underbody properly.
Is WD-40 good for the underbody?
Some people swear by it, but I reckon it just attracts more dust and sand. Use a proper lanolin-based spray or a dedicated underbody wax if you want real protection.
How soon do I need to wash it?
Ideally, the same day. If you're camping and can't, at least give it a fresh water rinse at a servo if they have a hose. Every hour it sits there, the salt is working.
Do I need to grease my uni-joints after the beach?
Yes. Salt water is a solvent and it can get past the seals. Give your grease points a couple of pumps until you see clean grease coming out.

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