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Getting the Grime Out: The Sand and Salt Removal Checklist

Red dust, creek crossings, and corrugated roads don't just test your 4WD—they test your cleaning game. Most people get it wrong.

Driving on the beach is a classic Aussie weekend, but leaving that salt and sand in your chassis is a death sentence for your metal. Here is how to get it all out before the rust sets in.

SC
Sarah Chen Interior & Leather Specialist
| Updated: 6 March 2026
Getting the Grime Out: The Sand and Salt Removal Checklist

Aussie Conditions

Aussie red dust is iron-rich and bonds to paint. A regular rinse won't cut it—you need proper pre-wash and pH-neutral soap to avoid scratching.
Quick Summary

Look, we've all done it, spent the day at Fraser or Robe and then felt too buggered to wash the car properly. I once left a Hilux unwashed for a week after a beach trip and the surface rust on the chassis was already starting to bite. This checklist is for the blokes and ladies who want to keep their rigs for more than two years without the floorboards falling out. This is my personal routine for getting every grain of sand and salt out of those annoying nooks and crannies.

01

The Gear You'll Need

What You'll Need

0/8
A decent pressure washer — Nothing crazy, a Karcher K2 or K3 is fine, but you need some poke.
Underbody water broom or angled wand — Don't bother crawling on your guts. These attachments are a lifesaver.
Salt-neutralising solution — I reckon Salt-Away or Bowden's Own Salt Wash are the gold standard here.
Soft bristle brush — For the wheels and tyres. Sand loves to hide behind the spokes.
Wet/Dry Vac with a crevice tool — For the interior. Don't use the missus's Dyson, she'll kill ya.
Microfibre wash mitt — Keep one specifically for beach days so you don't ruin your 'good' one.
Air compressor or leaf blower — The secret weapon for getting sand out of window seals.
A sturdy garden hose — For the high-volume low-pressure flood rinse.
02

Pre-Start Checklist

What You'll Need

0/4
Engine is cool to the touch — Spraying cold water on a hot manifold is a great way to crack things.
Windows and sunroof fully closed — Sounds obvious, but I've seen a mate flood his interior more than once.
Rubber floor mats removed — Chuck 'em on the driveway to deal with later.
Inspect for grease leaks — Sand sticks to grease like glue. Fix the leak or the sand will never leave.
03

The Clean-Up Process

Tap each step to mark complete
01

The Dry Vacuum

Before any water touches the car, vac the interior. If sand gets wet in your carpet, it's never coming out. Use a stiff brush to loosen the grains.

02

Underbody Flood

Get the hose and just flood the chassis rails. I usually spend 10 minutes just letting water run through the holes in the frame until it runs clear.

03

Salt Neutraliser Application

Spray your salt-dissolving wash everywhere under the car and in the wheel arches. Let it dwell for 5-10 minutes (don't let it dry) to break the salt bond.

04

The High-Pressure Blast

Work from the top down. Blast the wheel arches, behind the mudflaps, and inside the bumpers. Sand hides in the lips of the guards, so get right in there.

05

Engine Bay Dusting

Use a damp cloth or very light mist to clean the engine bay. Avoid direct high pressure on electrical bits. Red dust and salt here will corrode connectors fast.

06

Contact Wash

Now do a normal two-bucket wash. Sand is abrasive, so use heaps of soapy suds to lubricate the paint while you're wiping to avoid those nasty swirl marks.

07

Door Jams and Seals

Open every door. Use a wet microfibre to wipe the seals. I've found that sand in the seals acts like sandpaper and eats your paint over time.

04

Final Inspection Checklist

What You'll Need

0/4
Run your hand under the wheel arch — If it feels crunchy, you've missed a spot. Go again.
Check the radiator core — Look for sand or salt build-up in the fins. Be gentle, don't bend the fins.
Inspect the window tracks — Wind the windows down. If you hear a 'crunch', use the air compressor to blow it out.
Chassis rail drain holes — Poke a zip tie in there to make sure they aren't blocked by wet sand.

Watch Out

Whatever you do, don't use a 'touchless' car wash after the beach. They don't reach the underbody properly and often recycle their water, meaning you're just blasting your car with recycled salty brine. Also, steer clear of dish soap; it'll strip any wax you have left and make the salt damage even worse next time.

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