Note: this article covers brush-on (bottle kit) repairs. Aerosol kit application is different.
If the Scratch Edges Are Rough
If the chip has rough or jagged edges, loose paint, or raised flakes, smooth them before painting — they'll catch light and remain visible even after the scratch is filled.
The full prep procedure is in ScratchesHappen Bottle Instructions: wet-sand with 600-grit sandpaper, hand sanding, keeping the footprint tight. For super small chips, the footprint discipline matters most — sanding the surrounding paint turns a tiny repair into a much larger one.
For lighter rough edges, an alternative is polishing compound on a microfiber towel with finger pressure — more controlled than sandpaper, and well-suited to very small repairs.
(Wet-sanding here is on the factory paint, not on touch-up paint. Once ScratchesHappen paint is applied, wet-sanding will remove it.)
Three Tricks for Applying Less Paint
Thin the paint with up to 25% distilled water. Thinned paint flows better into very small or shallow scratches. Anywhere up to 25% works — don't overthink the ratio.
Use a soft artist brush. Stiffer brushes deposit more paint per stroke. People often try to avoid drag marks by loading more paint, which compounds the over-application problem. A soft artist brush takes less paint and applies it more lightly.
Apply with a micro dabber instead of a brush. Fine and super fine micro dabbers deposit even less paint than a soft brush. Useful for the smallest repairs.
Cleaning Up Excess Paint at the Edges
For removing overpaint from the edges of a small repair, see How to Remove Excess Paint at the Edges of a Repair. The micro dabber with water gives you precise visibility into what you're removing — particularly useful on tiny repairs where you can't afford to remove paint from inside the scratch.
Use ScratchesHappen Polishing Compound — it's mid-range in abrasiveness, less aggressive than typical "cutting" compounds. If you have a different polish on hand and it's removing paint too aggressively, switching to ours or a comparable medium cutting compound often helps. See What Polish Compound Works Well For Touch Up Paint Jobs.
FAQ
Why is touch-up paint too thick for super small chips?
Touch-up paint is sized to deliver enough material to fill typical chips and scratches in 2-3 coats. On very small or shallow damage, even a single thin coat can over-apply. The trick isn't to use less paint per coat — it's to change the application method so less paint comes off the brush per stroke.
Will thinning the paint affect the color or coverage?
Up to 25% distilled water won't significantly affect the color match, and on a small repair you don't need much coverage anyway. Past 25% the paint can become too transparent for proper coverage — particularly with reds and blues.
How do I clean my brushes after a brush-on repair?
Warm water. The brush kit's paint, primer, and clear coat are all waterborne. (Aerosol kits are different: the paint is waterborne but the clear coat and primer are solvent-borne, so those steps need paint thinner for cleanup.)
Why isn't the ScratchesHappen polish compound stronger?
For touch-up edge cleanup, gentler is safer. More aggressive "cutting" compounds can remove the paint inside the scratch along with the overpaint, especially before clear coat is applied. A mid-range compound gives you control.