First, understand what you're working with
Modern automotive paint is built in layers: primer on the metal, then a coloured base coat, and finally a clear coat on top. That clear coat is what gives the car its gloss and protects the colour underneath — and it's the only layer paint correction works in.
Correction uses a machine polisher and abrasive compounds to remove a microscopically thin layer of clear coat, levelling out the surface so light reflects evenly again. That's the whole trick: it doesn't "fill" defects, it removes the surrounding clear coat down to the bottom of them.
What correction removes
Done properly, paint correction eliminates the defects that live in the clear coat:
- Swirl marks from poor washing and automatic car washes
- Light to moderate scratches that haven't gone through the clear coat
- Water spot etching and mineral staining
- Light oxidation and dullness on older paint
- Buffer trails and holograms from previous bad polishing
What it can't fix
This is the part nobody likes to hear, but it matters. Correction cannot repair:
- Scratches that have cut through to the base coat or primer — those need a respray
- Deep stone chips where paint is already missing
- Orange peel texture from the factory or a respray (that's a different, riskier process)
- Rust or bubbling under the paint
A quick test: run a fingernail lightly across a scratch. If it catches, it's likely too deep to fully correct and can only be improved, not erased.
One-stage vs two-stage correction
One-stage correction is a single cutting-and-polishing step. It's ideal for paint with light swirls and gives a big improvement quickly. Two-stage correction adds a separate compounding step before refining — used for heavier defects where one pass won't cut deep enough to remove them while still leaving a flawless finish.
Which one your car needs depends entirely on its current condition, which is why we always inspect under proper lighting before quoting.
Why paint thickness matters
Most factory cars have only 80–120 microns of clear coat, and correction removes roughly 1–5 microns per stage. That's a finite resource — you can't correct the same panel endlessly. A responsible detailer measures paint thickness, works conservatively, and tells you honestly when a panel has been corrected before and shouldn't be cut further.
Always correct before coating. A ceramic coating locks in whatever's underneath it. If you coat over swirls and scratches, you've sealed in the defects for years — and correcting later means stripping the coating you just paid for. Correction first, protection second. Every time.
Realistic expectations
Correction dramatically improves the vast majority of paint we see. But the final result always depends on the original paint's condition and how much clear coat is left to safely work with. A good detailer's job is to get the maximum safe improvement — and to be upfront when a defect is beyond what correction can achieve. We'd rather under-promise and let the finished result speak for itself.