The fingernail test: how deep is it?
Your car's finish is a stack of layers: clearcoat on top, color (base) coat beneath it, primer under that, then bare metal. The repair — and the price — depends entirely on which layer the scratch reached:
| Fingernail test | What you're seeing | Fix | Typical cost |
|---|---|---|---|
| Nail glides over it | Clearcoat scratch (looks white or hazy) | Polish/compound it out yourself | $15–$30 DIY |
| Nail catches, color visible | Through clearcoat into color coat | Touch-up paint, or pro touch-up | $15 DIY / $150–$300 pro |
| Dull gray showing | Down to primer | Professional refinish recommended | $300–$600 per panel |
| Shiny silver metal | Bare metal exposed — will rust | Professional respray, soon | $300–$800 per panel |
Test in good light, and run the nail across the scratch, not along it. If any part of the scratch catches, judge by the deepest point — a scratch that's shallow for 90% of its length but hits metal at one end still needs the deep fix at that end.
Clearcoat scratches: polish them out yourself
If your nail doesn't catch, the scratch is only in the clearcoat — the transparent protective layer. These look worse than they are (white, hazy lines that seem deep) and they're the easiest fix in bodywork. A scratch-remover compound with light abrasives levels the clearcoat around the scratch until the line disappears. Work by hand on a clean panel: apply a small amount to a microfiber applicator, rub along the scratch with moderate pressure, wipe clean, and inspect. Two to three passes handle most clearcoat scratches. Finish with wax or sealant to protect the freshly leveled clearcoat. Total cost: under $20, and about 20 minutes.
Paint-layer scratches: touch-up paint done right
When the scratch catches your nail but you still see your car's color (not gray, not metal), the color coat is damaged and touch-up paint is the honest fix. The key is the color code — it's on the driver's door jamb sticker or under the hood, and a factory-match pen in that exact code is what makes the repair disappear instead of standing out. The method that actually works: clean the scratch with alcohol, apply paint in thin coats with the pen's fine tip (never glob it on), let each coat dry, build it just level with the surrounding paint, then seal with the clearcoat side of the pen. Patience beats quantity — three thin coats look factory; one thick coat looks like a blob. Deep single scratches (key marks) can take 30 minutes of careful layering and look surprisingly good.
Primer or bare metal: get it refinished
Gray primer or shiny metal means the scratch went through every protective layer, and this is where DIY stops being the right answer. Touch-up paint over bare metal is a bandage, not a repair — without proper sanding, primer, base coat, and clearcoat, moisture gets under the edges and the repair fails within a year or two. Worse, exposed metal rusts: in road-salt states, a bare-metal scratch can start showing corrosion in a single winter, and rust repair costs far more than the respray would have. A professional panel respray ($300–$800 depending on the panel and paint type — tri-coat and pearl finishes cost more) properly seals the metal and blends the color so the repair is invisible. Don't let a deep scratch sit through winter waiting for a convenient time.
Document it before you touch anything
Photograph the scratch first — wide shot of the panel, close-ups from two angles, one showing the car's location. If you can identify who did it (a note, a witness, camera footage), those photos plus the other party's info turn this into a claim against their liability insurance instead of your wallet. Even if you can't find them, dated photos protect you if the scratch is later blamed on you (lease returns and dealer trade-ins both love finding "new" damage). Only start the repair after the documentation exists.
When it's worth filing vs. paying out of pocket
Do the same math as any small claim: a typical deductible is $500–$1,000, and most parking lot scratches cost less than that to fix professionally. Filing a claim for a $400 respray against a $500 deductible gets you nothing but a claim on your record — and that record can raise your premiums for years. Pay out of pocket for anything under your deductible. The exception: if you identify the at-fault driver, file against their liability coverage — no deductible for you, no claim on your history.
Related cost guides
Frequently asked questions
Will a car scratch rust if I ignore it?
Only if it goes through the paint to bare metal. Clearcoat and paint-layer scratches can't rust because the metal is still sealed. But a scratch showing gray primer or shiny metal will start corroding — especially in winter road-salt states — so those need real repair, not just touch-up.
Can I use touch-up paint on a deep scratch?
Touch-up paint works for scratches in the paint layer where the color coat is damaged but the area is small. It won't properly fix scratches down to primer or bare metal — it can seal them temporarily, but without proper prep, primer, and clearcoat, it won't last or look right. Deep or long scratches need professional refinishing.
How much does it cost to fix a car scratch professionally?
A professional touch-up on a small scratch runs $150–$300. A full panel respray — required for deep scratches or long key marks — typically costs $300–$800 per panel, more for tri-coat or pearl finishes that need extra blending.
Should I file an insurance claim for a parking lot scratch?
Usually not. Most parking lot scratches cost less to fix than a typical $500–$1,000 deductible, and filing puts a claim on your record that can raise premiums. Pay out of pocket unless the damage is extensive or you can identify the at-fault driver and claim against their liability coverage.