Quick answer: for isolated chips a 20ml pen is usually plenty; a 30ml bottle is better for multiple chips or small scuffs; a 400ml aerosol is the practical choice for larger sprayed repairs. The exact amount depends on the area, colour, substrate and number of coats.
How much car touch-up paint do I need?
| Repair | Typical product choice |
|---|---|
| One or several small stone chips | 20ml touch-up pen |
| Multiple chips, deeper scratches or small scuffs | 30ml touch-up bottle |
| Bumper corner, mirror cover or local panel section | 400ml aerosol |
| Larger panel refinishing | May require more than one aerosol depending on coverage and number of coats |
Why is there no single coverage number?
Coverage varies with the colour, spray technique, surface colour, primer shade, repair size and how many coats are needed for opacity. Metallic and pearl finishes may also be applied differently from solid colours.
How much paint should I use on a stone chip?
Very little. Apply only enough to build the damaged area in thin layers. A heavy blob can take longer to dry and may sit above the surrounding factory paint.
How many aerosol coats will I need?
Apply multiple light, even coats until the colour has covered appropriately, following the product instructions between coats. Do not try to achieve full coverage in one wet coat.
Do I also need primer and lacquer?
Possibly. Primer may be required where the substrate is exposed. Lacquer may be required by the specific colour system, especially with many basecoat metallic and pearl finishes. These are separate from the amount of colour coat required.