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Car Washing & Drying beginner 6 min read

How to Clean Snorkels and Roof Racks Without Ruining the Trim

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

Roof racks and snorkels are the first things to fade under the Aussie sun and the hardest to clean after a trip up the coast or through the red dust. Learn how to get the grime off and stop that plastic from turning grey and chalky.

MT
Mick Thompson Senior Detailing Editor
| Updated: 5 March 2026
How to Clean Snorkels and Roof Racks Without Ruining the Trim

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, most blokes just hit their racks with a high-pressure hose at the servo and call it a day, but that's how you end up with streaky plastic and rusted bolts. This guide is for anyone who actually wants their rig to look decent and last more than two seasons. I'll walk you through the gear you need and how to deal with everything from smashed bugs to that stubborn salt spray that eats away at your gear.

01

Getting Stuck Into the Grime

Right, so you've just come back from a big trip or maybe the rig is just looking a bit sad after sitting under a gum tree all summer. Snorkels and roof racks are absolute magnets for the worst stuff Australia can throw at us. I reckon the combination of our mental UV levels and that fine red dust is the ultimate killer for plastics. I've seen brand new snorkels turn a chalky grey in under a year because the owner didn't look after them. I remember a customer brought in a 79 Series that had been across the Nullarbor and then parked near the beach for a month. The salt had literally bonded the red dust into a crust on his Rhino-Rack. It took me bloody ages to get it right. Thing is, you can't just scrub these things with any old detergent. You need a bit of a system so you're not scratching the paint or leaving the plastic thirsty for moisture. Let's get into it.
02

The Right Gear for the Job

What You'll Need

0/8
Soft-bristled detailing brush — Essential for getting into the grooves of the snorkel head and rack channels.
Quality APC (All-Purpose Cleaner) — I swear by Bowden's Own Wheely Clean or a diluted citrus pre-wash.
Long-reach microfibre wash mop — Unless you're seven feet tall, you'll need this for the middle of the rack.
Bug and Tar remover — Autoglym makes a cracker that won't eat your plastics.
Plastic trim protectant — Get something with high UV inhibitors like 303 Aerospace or Meguiar's Ultimate Black.
Pressure washer (optional) — Good for the heavy lifting, just don't go too close to the snorkel intake.
Two buckets — One for soapy water, one for rinsing your mitt.
Microfibre drying towels — The big fluffy ones that actually soak up water.
03

Preparation

Tap each step to mark complete
01

Park in the shade

Never, ever wash your car in the direct Aussie sun if you can help it. The chemicals dry too fast and leave spots. If it's a 40-degree arvo, wait until the sun drops a bit.

02

Check the snorkel head

Pop the grill off the snorkel intake. You'd be surprised how many dead Christmas beetles and leaves get stuck in there. Give it a shake out before you start spraying water.

03

Cool down the surfaces

Give the whole roof and snorkel a quick blast with plain water just to bring the temperature of the metal and plastic down.

04

The Cleaning Process

Tap each step to mark complete
01

The Initial Rinse

Start from the top. Use your hose or pressure washer to knock off the loose red dust and salt. If you skip this and go straight to scrubbing, you're basically using that dust as sandpaper on your paint.

02

Apply Pre-Wash

Spray your APC or citrus foam onto the snorkel and the roof rack. Let it sit for about 3-5 minutes, but don't let it dry. This breaks down the oily road film and bird droppings.

03

Detail the Snorkel Cracks

Take your soft brush and work the cleaner into the gaps where the snorkel meets the guard and around the intake grill. This is where the salt hides and starts the rust process on your panels.

04

Scrub the Rack Channels

Roof racks have those T-bolt channels that collect everything. Use the brush to get in there. If you've got an awning attached, make sure to clean the bracket area well.

05

The Contact Wash

Use your wash mop or a microfibre mitt with a high-lubricity car soap. I reckon Meguiar's Gold Class is great for this as it doesn't strip existing wax but has enough grunt for dirt.

06

Dealing with Bug Guts

If you've been out west, the front of that snorkel is probably peppered with bugs. Use a dedicated bug remover here. Don't use a kitchen scourer, I've seen people do it and it ruins the finish.

07

Final Rinse

Rinse everything thoroughly. Pay special attention to the door seals under the roof rack and the base of the snorkel. You want all that soap gone.

08

Drying is Key

Don't let it air dry in the wind, or you'll get water spots. Use your microfibre towel to pat it dry. I sometimes use a leaf blower to get water out of the rack channels so it doesn't drip later (the missus thinks I'm mad, but it works).

09

Apply UV Protection

Once it's bone dry, wipe down the snorkel and rack with your protectant. This is the most important part for preventing that 'grey' look. Rub it in well and buff off any excess.

Watch Out

When you're using a pressure washer near the snorkel head, be careful. You don't want to blast gallons of water directly down the pipe. Most snorkels have a water separator, but don't push your luck. Angle the spray away from the opening.

The Red Dust Secret

If you've got that stubborn WA or NT red dust that won't budge, try an iron fallout remover. Sometimes the dust is actually metallic in nature and a normal soap won't touch it. Just test a small spot first to make sure it doesn't stain the plastic.
05

Keeping it Looking Shmick

Look, aftercare isn't just about making it look pretty for the neighbours. It's about longevity. If you leave salt spray on those powder-coated aluminium racks, they will eventually start to bubble and peel. I usually tell my mates to give the rack a quick wipe down with a damp cloth after every beach trip, even if they aren't washing the whole car. Another thing, check your bolts. Every time I clean my rack, I give the Allen keys a quick turn just to make sure nothing has vibrated loose on the corrugated roads. A clean rack is the best time to spot a crack in a bracket or a loose fitting before it becomes a problem on the highway.

Watch Out

Steer clear of those cheap, greasy 'tyre shine' sprays on your snorkel. They look good for five minutes, but they're like a magnet for dust. You'll end up with a brown, sticky mess the next time you hit a dirt road. Stick to water-based UV protectants.
06

Common Questions

Can I go through an automatic car wash with a roof rack?
How do I get bird poop stains off the plastic?
My snorkel is already grey. Can I fix it?
Should I wax my roof rack?

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