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Used Car Deep Clean Checklist

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

Just picked up a second-hand rig and it feels a bit grotty? Here is exactly how to strip back months of neglect and get that 'new car' feeling back without wasting a whole weekend.

Used Car Deep Clean Checklist

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've all been there, you buy a used car and find out the previous owner basically lived in it. Whether it's red dust from a lap around the country or just years of built-up gunk, a proper deep clean is non-negotiable. I reckon a used car isn't really yours until you've scrubbed every inch of it yourself. This checklist is what I use in my shop to get them sorted fast.

01

Setting the Scene

I once did a deep clean on a 'pristine' LandCruiser where the guy swore it had never been offroad. Five minutes in, I found half of the Simpson Desert hidden under the rear seats. Truth is, people hide stuff, or they just get lazy. This guide is about stripping back the 'previous owner' and starting fresh.
02

The Good Gear (What You Need)

What You'll Need

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Two buckets with grit guards — Essential. Don't go rubbing dirt back into the paint.
A decent APC (All Purpose Cleaner) — I swear by Bowden's Own Wheely Clean or Orange Agent for the tough stuff.
Iron fallout remover — Crucial for used cars to get those tiny metallic specs off the paint.
Clay bar or clay mitt — A mitt is faster, but a bar is better for tight spots.
Soft detail brushes — For vents, badges, and all those annoying cracks.
Microfibre towels (loads of 'em) — At least 10. Don't use the same one for wheels and seats.
Wet/dry vacuum — The more suction the better for that ground-in sand.
Fabric cleaner or leather conditioner — Depending on your seats. Autoglym Leather Balm is my go-to.
UV Protectant — Aerospace 303 is the only one I trust in the Aussie sun.
03

Pre-Start Checklist

What You'll Need

0/4
Check for clear coat failure — If the paint is flaking, stop. A pressure washer will make it worse.
Verify the 'hidden' spots — Check under the spare tyre and behind the fuel door.
Test cleaners on a small patch — Made this mistake on a black Commodore once, stained the door card. Always test first.
Park in the shade — Never do this in the direct sun, especially in May when the UV is still biting.
04

The Deep Clean Process

Tap each step to mark complete
01

Wheels and Arches

Hit them first while they're cool. Use a stiff brush for the tyres and a soft one for the rims. Get right into the arches to flush out any coastal salt.

02

The Strip Wash

Use a high-pH soap to strip old waxes. If it's covered in bird droppings or bat gunk, let the foam dwell for 5 minutes before rinsing (don't let it dry!).

03

Chemical Decontamination

Spray iron remover on the paint. If it turns purple, it's working. This is vital if the car lived near a train line or heavy industry.

04

Mechanical Decon (Clay)

Run a clay bar over the wet paint. If it feels like sandpaper, you're doing it right. It should end up smooth as glass (trust me on this one).

05

Interior Blowout

Use compressed air or your vac to get the dust out of the vents and seat tracks. You'll be shocked at what flies out of there.

06

Deep Scrub Interior

Scrub the plastics with APC and a brush. Wipe away the grime immediately. Don't forget the steering wheel, it's usually the filthiest part of any used car.

07

Glass and Protection

Clean the windows twice. Then, chuck a sealant on the paint and a UV protectant on the dash to stop it cracking in the 40-degree heat.

05

Final Inspection

What You'll Need

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The 'White Glove' vent check — Is there still dust in the air con vents?
Door jambs — Open every door. If the jambs are greasy, the job isn't done.
Smell test — Does it smell like 'clean car' or just 'shampoo covering up wet dog'?
The streak check — Look at the windscreen from inside against the light. Any smears?

Watch Out

First, don't use 'shiny' silicone dressings on the dash, the glare off the windscreen in the Aussie sun will blind you. Second, never use a magic eraser on leather or gloss plastics; it's basically sandpaper and you'll ruin the finish in seconds.
06

That's a Wrap

Anyway, give it a crack. It's a bit of elbow grease, but once you see that red dust disappear and the paint actually shine again, you'll reckon it was worth it. Your partner will thank you for not making them sit in someone else's filth, too. No dramas!

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