There are few things as satisfying as claying a car. Paint is porous and slowly builds up contamination you cannot always see, but you can definitely feel it. Using clay removes that buildup, leaving the surface noticeably smoother. It is the kind of difference you can feel straight away, and sometimes even hear as you work. Claying is not just for paint either. You can also clay glass, windscreens, and clear plastics like headlights to remove bonded contamination and improve clarity.

Clay bar or clay mitt — which should you use?

At Rockcar we offer two ways to clay: traditional clay bars and the Rockcar Clay Mitt. Both remove bonded contamination from your paint. The difference is in how you work and how much you remove.

Rockcar Clay Bars — Light, Medium, and Heavy

Clay bars are the traditional method and the most thorough. You work a small section at a time, which is slower but gives you more control and removes more contamination per pass. If your vehicle has not been clayed in a long time, has heavy industrial fallout, rail dust, or paint overspray, a clay bar will give you the most complete result.

• Light — for regularly maintained paintwork with light contamination
• Medium — for most cars, most of the time
• Heavy — for seriously contaminated paint, industrial fallout, or vehicles that have not been clayed in years

Rockcar Clay Mitt

The Clay Mitt covers a larger surface area per pass than a clay bar, making it significantly faster — a full vehicle takes 5–15 minutes. Its high-density polymer synthetic clay surface is designed to channel contaminants into the material rather than dragging them across the paint, which reduces marring risk. It is reusable for 100–120 vehicles and is ideal for regular maintenance claying, detailers working on multiple vehicles, or anyone who wants a fast, effective clean before polishing or sealing.

If you want the most thorough decontamination possible, choose a clay bar. If speed and convenience matter and your paint is regularly maintained, the Clay Mitt is the right tool.

How to clay your car

Claying is easier than it sounds. If you can wash a car, you can clay one. Here's how.

What you need

• A clay bar (Light or Medium for most cars, Heavy for serious contamination) or the Rockcar Clay Mitt
• Clay lubricant — use plenty, more is always better than not enough
• A clean microfiber cloth for wiping down after each panel

Before you start

Wash the car thoroughly first to remove any loose dirt and grit. Clay works on bonded contamination — the stuff washing alone can't shift. You want the surface clean before you start so you're not dragging loose dirt across the paint.

Work in the shade on cool paint. Never clay in direct sun or on a hot panel.

How to do it with a clay bar

Tear off about a third of the bar and flatten it into a disc shape in your palm. Keep the rest sealed — it'll dry out if left open.

Spray the clay lube generously onto one panel. A 50 × 50 cm area is a good working size. Don't be stingy with the lube — it's what keeps the clay gliding safely and protects your paint.

Glide the clay across the panel in straight lines using light pressure. Let the clay do the work. You'll feel and hear it grabbing at contamination as it goes — a slight roughness and a subtle sound. As the panel cleans up the clay will start to glide more freely and quietly. That's how you know it's working.

Fold the clay over on itself regularly as you work to bring a fresh, clean surface forward. When the whole face of the clay looks dirty, fold and reshape.

Wipe the panel down with a clean microfiber cloth, then move to the next section.

How to do it with the Clay Mitt

Soak the mitt in water and keep it wet throughout. Spray clay lubricant generously onto one panel and work the polymer clay side of the mitt across the surface in light, overlapping passes. No downward pressure — the weight of your hand is enough.

Rinse the mitt under running water regularly as you work to clear trapped contaminants from the surface. Because the mitt works quickly it is easy to keep moving after the lubricant has thinned out — stay attentive and reapply lube often. If you feel any drag or resistance at any point, stop immediately, reapply lubricant, and rinse the mitt before continuing.

Wipe the panel down with a clean microfiber cloth, then move to the next section.

The rules you cannot break

If you are using a clay bar

If you drop the clay on the ground, throw it away immediately. No exceptions. It will have picked up grit and will scratch your paint. A clay bar is cheap. A respray is not.

If you are using the Clay Mitt

Never let the lubricant run dry. Because the mitt works faster than a clay bar it is easy to keep moving without noticing the lube has thinned out. That is when marring happens. If you feel any resistance, stop immediately, reapply lubricant, and rinse the mitt under running water before continuing. Speed is the mitt's biggest advantage — and the thing that requires the most attention.

When you're done

Run your fingertips across a panel you've clayed — it should feel noticeably smoother, almost glassy. That's bare, clean paint.

Always apply a layer of protection after claying — wax, sealant, or ceramic coating. Freshly clayed paint is clean and bare, which means it's also unprotected. Don't leave it that way.

That's it

Seriously, that's all there is to it. The first time you clay a car you'll wonder why you waited so long.