Drywall
How to Patch a Nail Hole the Right Way
Most nail-hole patches fail because they shrink, leaving a dimple. Two-pass spackling with the right product solves it.
Skip the toothpaste myth — it does nothing long-term and won't take paint. Use lightweight spackling (DAP DryDex or 3M Patch Plus Primer) for anything smaller than a dime.
Press a small amount into the hole with a 2" putty knife, scrape flush, then immediately wipe the surrounding wall clean. Spackling shrinks as it dries, so come back in 20 minutes and add a second skim coat just over the hole.
Sand lightly with a fine sponge once it's fully dry — usually overnight for a deeper hole. Prime the patch, even if your spackle claims to be 'paint-ready.' Unprimed patches absorb paint at a different rate and flash on the wall.
Touch up with the same paint, ideally rolled on with a small foam roller rather than dabbed with a brush — that's the same flashing problem covered in my paint touch-up article.