Short answer: small dart holes in a wall can usually be fixed by cleaning out loose dust, pressing in lightweight wall filler, letting it dry fully, sanding it flush, then priming or mist-coating before painting. If darts keep hitting the wall, the real fix is not more filler. Add a surround, cabinet or backing board so the damage does not come back.
Last reviewed: 23 August 2026. This is general DIY guidance for small cosmetic holes in ordinary interior plaster or plasterboard. If the wall is damp, crumbly, cracked, structurally damaged, asbestos-risk, electrical-risk or part of rented accommodation, check the right professional or landlord guidance before repairing.
First decide what kind of damage you have
Most dart marks are small punctures. They look annoying, but they are usually shallow cosmetic damage. Those can normally be repaired with ready-mixed lightweight filler and a careful repaint. The problem changes if the dart has made a soft crater, torn the paper face of plasterboard, loosened plaster, or left a hole that flexes when pressed.
Do not treat every mark the same. A pin-sized hole needs a cleaner, quicker repair than a damaged patch of plasterboard. Repeated clusters around the board also tell you something else: the playing area is under-protected. If you only fill the wall and leave the same exposed setup, you are likely to repeat the job.
What you need for a clean repair
For small dart holes, keep the kit simple: a scraper or filling knife, lightweight interior wall filler, fine sandpaper, a damp cloth, dust protection, primer or mist coat if needed, and matching paint. A vacuum with a small nozzle is useful for clearing dust out of the holes before filling.
For deeper holes or damaged plasterboard, you may need a stronger repair product, multiple thin filler layers, jointing compound, mesh or a patch. If the wall surface moves, bulges, crumbles or sounds hollow across a larger area, do not hide the problem with filler. Repair the substrate first.
Good DIY repair is mostly preparation. B&Q's guide to filling holes in walls starts with removing loose material and dust before applying filler, then sanding once dry. Ronseal gives similar guidance: clean loose material, push filler into the hole, smooth it, let it dry, sand flush and paint. The method is not complicated, but rushing any stage leaves visible repair marks.
Step-by-step: fixing small dart holes
1. Clear the wall area. Take the board down if it is in the way, move furniture, and protect the floor. If the wall is newly painted or delicate, test cleaning and sanding in a discreet area first.
2. Clean each hole. Use the edge of a scraper, fine brush or vacuum to remove loose plaster dust. The filler needs a clean surface to grip. Do not leave powder sitting inside the hole.
3. Press filler into the hole. Use a filling knife to push a small amount of filler into each mark. For tiny holes, do not smear a large patch across the whole wall. Work neatly and keep the filler close to the damage.
4. Leave it slightly proud. A tiny raised finish is easier to sand flush than a sunken repair. Avoid a heavy mound because it creates more sanding and more risk of scuffing the surrounding paint.
5. Let it dry fully. Follow the filler packaging. Drying time depends on product, depth, room temperature and ventilation. Painting over wet filler is one of the quickest ways to make the repair visible.
6. Sand gently. Use fine sandpaper and light pressure. The goal is a flush surface, not an aggressively polished patch. Wear suitable eye protection and a dust mask when sanding.
7. Prime or mist-coat where needed. Filler can absorb paint differently from the surrounding wall. Ronseal recommends a mist coat to help a filled repair blend. Dulux also notes that deeper holes should be built up in layers before sanding and painting.
8. Paint to match. Use the same paint if you have it. Feather the edges lightly so the repair does not leave a hard rectangle. If the wall paint has faded, a tiny touch-up may still show in some light; repainting a wider area may be cleaner.
When filler is enough and when it is not
| Damage | Likely repair | Watch out for |
|---|---|---|
| Pin-sized dart marks | Lightweight filler, sand, touch-up paint | Dust left in the hole |
| Small shallow craters | Filler applied slightly proud, then sanded flush | Overfilling too widely |
| Deeper gouges | Layered filler or stronger repair compound | Shrinkage and drying time |
| Torn plasterboard paper | Seal, skim or patch depending on damage | Raised edges showing through paint |
| Soft or moving wall section | Patch or replace damaged board/plaster | Hiding structural damage with filler |
The judgement call is whether the wall is still solid. If the hole is small and the surrounding plaster is firm, filler is normally enough. If the surface moves, flakes, keeps cracking or has been repeatedly hit in the same area, step back and treat it as a damaged wall section rather than a single hole.
How to make the paint repair less obvious
The filler repair can be technically sound but still visible because paint behaves differently over filler. The surface may look dull, shiny or slightly raised. This is why the prime or mist-coat stage matters, especially on matt walls and older paint.
Use thin coats rather than trying to hide the repair in one thick coat. If you only touch the exact filled spot, the colour or sheen may stand out. Feathering the paint outward softens the edge. On walls with strong light across them, even a good touch-up can show, so repainting from corner to corner may be the cleanest finish.
If you rent, avoid broad repainting without checking your agreement. Small repairs may be fine, but matching landlord paint badly can create a bigger issue than the original dart marks.
Why the holes happened in the first place
Wall damage usually comes from one of four causes: beginners learning, guests throwing casually, poor lighting, or a board setup with no protection. Occasional misses are normal. A wall full of holes means the setup is asking the wall to absorb practice mistakes.
Check the basics before blaming the player. The board should be mounted at the correct height, the oche should be the right distance, and the room should have enough light around the trebles and doubles. If the setup is wrong, misses can spread. The guide to dartboard to oche distance is worth checking before you repair the same wall twice.
How to stop new dart holes
The cleanest prevention is a dartboard surround, cabinet or backing board. A surround protects the wall around a bristle board without changing the board itself. A cabinet gives a more traditional look and closes away when not in use. A wider backing board is better if children, beginners or party guests use the setup.
If you are repairing repeated holes, prevention is the part that saves money. Browse dartboards if the board itself is worn or bouncing darts out, and use darts accessories for surrounds, mats, flights, stems and setup extras. If beginners are missing wildly because the darts are uncomfortable or too battered to fly consistently, a sensible set from dart sets can help, but protection around the board should still come first.
Also inspect the darts. Bent points, damaged flights and loose stems can make a dart behave unpredictably. Replacing small accessories is cheaper than repairing a decorated wall every month.
How wide should the protection be?
For confident adult players, a standard surround may be enough because most misses are close to the board. For beginners, children or mixed family play, think wider. The first few weeks of practice can produce misses above, below and beside the board, especially when players rush or grip too hard.
A cabinet protects a neat rectangle around the board and looks tidy in a shared room. A foam surround is quick and practical. A full backing board gives the most forgiving area and can be painted to match the room. If the repair marks are spread well beyond a normal surround, choose wider protection rather than hoping accuracy improves immediately.
Floor protection matters too. Darts that bounce out can mark floors, skirting boards and furniture. A proper mat also makes the oche clearer, which helps the player stand consistently and keeps the setup more controlled.
When the repair is not worth doing first
Sometimes the wall is too damaged for a neat touch-up to be worthwhile. If there are dozens of holes, mismatched paint, torn plasterboard paper and repeated dents, fitting a backing board before chasing a perfect invisible repair may be the practical route. You can still clean and stabilise the wall, but the backing board becomes the visible finish.
The same applies in utility rooms, garages and temporary practice spaces. A flawless decorated-wall repair matters less than a safe, stable board area. In a living room, spare bedroom or customer-facing venue, the finish matters more, so repair and repaint first, then add protection carefully.
Common mistakes to avoid
Painting over dust: paint and filler need a clean surface. Dust inside holes weakens the repair.
Sanding too aggressively: you can flatten the filler but scar the surrounding paint, creating a bigger visible patch.
Using too much filler: a small dart hole does not need a wide mound. Keep the repair local.
Skipping drying time: wet filler under paint can shrink, flash or stay visible.
Ignoring repeated misses: filler solves the wall surface. It does not solve an exposed dartboard area.
Visual guide: how to apply this at the board
Related reading
For a safer home setup, start with the official dartboard to oche distance. If misses are coming from aim rather than guests or setup, read how to aim darts like a pro. Beginners should also check where a beginner should aim in darts so practice stays realistic.
Sources used
- B&Q guide to filling holes in a wall.
- Ronseal guide to filling a hole in your wall.
- Dulux guidance on preparing walls for painting.
- B&Q wall preparation guide for filling and sanding before painting.
Bottom line
Small holes from darts are usually a straightforward filler, sand and paint job. The premium finish comes from cleaning the holes properly, letting filler dry, sanding gently and priming or mist-coating before repainting. But if the wall keeps getting hit, protect the board area. Repair once, protect permanently, then stop the next holes.
FAQ
Can I fill small dart holes myself?
Yes. Small cosmetic holes in firm interior plaster or plasterboard are usually suitable for a simple DIY filler repair.
Why can I still see the repair after painting?
The filler may not be flush, the paint may not match, or the filled area may be absorbing paint differently. Sand gently and use primer or a mist coat where needed.
Do dartboard surrounds stop wall holes?
They reduce damage around the board by catching near misses. For very wide misses, a larger backing board or cabinet area may be better.
Should I repair holes before installing a surround?
Yes. Repair and repaint first if you want a clean finish, then install protection so the same area is not damaged again.
