Your Bonnet Isn't Dirty. It's Cooked.

You washed it on Saturday. Then again on Sunday. Monday you park it in the sun and the bonnet still looks dusty. Grey film. Colour washed out. You could write your name in it.

That is not dirt.

Dirt comes off with soap. This does not. You have been washing a cooked panel, and every extra scrub just convinces you the next wash will finally do it. It will not.

This is post two. Post one was how to wash in Aussie heat (https://www.rstrd.com.au/your-youtube-car-wash-is-wrong-if-you-live-here) without swirling the paint. This is what happens after a few summers of that same sun sitting on your clear coat.

What "cooked" actually is

Your paint is a sandwich. Colour underneath, a thin clear coat on top. The clear is the UV shield. Australian sun breaks it down. The surface goes chalky and flat. Colour looks faded even when the panel is clean. Water sits in blotches instead of sheeting off.

That breakdown is oxidation. UV chewing through the clear until it stops reflecting light the way it used to.

It is not swirl marks. Swirls are fine scratches in a surface that still has gloss. You see them in afternoon sun as little circles, but the paint still looks wet around them. Cooked paint looks dusty after a dry. No depth. No wet look. Just chalk.

Horizontal panels cop it first. Bonnet, roof, boot lid. They face the sky all day. Red cars and black cars cook faster. Red pigments fade hard in this UV. Black shows every bit of haze. If you park outside with no garage in Queensland, WA, or inland heat, you are on the fast track.

You cannot wash oxidation off. The chalk is the clear coat itself, dying in place.

The honest test

Do this in the shade, on a cool panel.

Wash it properly, the way post one (https://www.rstrd.com.au/your-youtube-car-wash-is-wrong-if-you-live-here) described, not a quick hose and a sponge. Dry it with a clean microfibre. Look at the bonnet in open shade, not in the glare.

If it still looks faded, it is not leftover dirt. It is oxidation.

Then the second check. Pick a hidden spot. Lower corner of the boot lid, or a bit of the roof you do not stare at. Put a dab of cutting polish on a clean microfibre and wipe that spot with light pressure. Wipe the residue off.

If gloss comes back, there is clear left to work with. The cooked layer is still sitting on top of healthy clear. Polish can level it.

If it stays dead, or colour comes off on the cloth, stop. The clear is gone. You are into the colour coat or primer. Polish will not save that. That is a respray. Keep compounding a failed panel and you just make a bigger mess.

The RSTRD restore

Work in the shade. Cool panels only. If the bonnet is hot to touch, wait.

WASH FIRST. Do the job from post one (https://www.rstrd.com.au/your-youtube-car-wash-is-wrong-if-you-live-here). Cool time of day, pre-rinse, two buckets, grit guards, pH-neutral shampoo, dry with a microfibre. You cannot polish dirt. Grit under a pad is sandpaper.

DECONTAMINATE. If the paint still feels rough after a proper wash, clay it. Clay bar, plenty of lube (clay lube or soapy water, enough that the bar glides). Light pressure. Fold the clay as it picks up junk. Stop if it grabs. You are not sanding. You are pulling bonded grit off so the polish does not drag it around.

POLISH. This is the actual restore. You need a cutting compound, not a finishing polish and not a wipe-on shine spray. The compound levels the oxidised top of the clear. Foam or microfibre pad. A machine (dual action) is faster and more even. By hand is slower, and you will struggle to keep the cut consistent across a whole bonnet. Small sections. Keep the pad clean. Do not dry-buff. Do not lean on the machine and stay in one spot until the clear is gone. You are removing a cooked layer, not digging to primer.

Wipe down with a clean microfibre. Check the gloss in the shade. If a section is still chalky, one more light pass, then stop. More is not always better.

PROTECT. Fresh clear with no wax or sealant will cook again in a month in this climate. Put something on it the same day. Wax or a paint sealant. Either is fine. The point is UV cover so you are not back here next summer. Park in shade when you can. A cover helps if you live with full sun and no garage.

That is the path. Wash, clay if needed, cut, wipe, protect. Skip a step and you either swirl the paint or you bring the gloss back for a week.

What not to do

More washing. You already tried. The chalk is not dirt.

Dish soap. It strips whatever protection is left and dries the clear out. It is for plates.

Kitchen compounds. The paste you use on a stainless sink is not paint-safe. It is too aggressive, and you will haze or burn through the clear.

"Restoration in a bottle" sprays as a substitute for actually levelling the clear. Some of them fill haze for a week. They do not remove oxidation. When they wash off, the bonnet is cooked again.

Polishing hot panels in midday sun. Compound flashes, pads cake, and you have no idea how much clear you are removing.

Sanding, unless you already know what you are doing. On a thin factory clear, wet sanding is how you go through to colour in one pass.

Gear

You do not need a trolley full of bottles.

• The wash kit from post one (buckets, mitt, shampoo, drying towel)

• Clay bar and clay lube

• A cutting polish (compound, not a finishing glaze)

• Foam or microfibre pads

• Clean microfibres (dedicated, not the drying towel)

• Wax or a paint sealant

That is the list. Use what matches the job.

This is post two

Wash does not fix a cooked bonnet. Polish does, if there is clear left. If there is not, that is a respray, and pretending otherwise wastes a weekend.

Next up is interiors.

RSTRD is Your Digital Aussie Garage. Honest car-care, how-tos, and gear picks. No paid reviews. No sponsored junk.

No-nonsense tips on car detailing, DIY repairs, and car restoration for Australians. 100% honest reviews. No sponsored junk.

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