Learn how to fix resin dimples after curing with simple sanding, cleaning, recoating, and prevention steps for glossy beginner resin projects.
Tiny dents, craters, and low spots can make an otherwise beautiful resin project look unfinished. The good news is that you can usually fix resin dimples after curing without remaking the whole piece. Most dimples are surface problems caused by dust, bubbles, contamination, uneven heat, or resin pulling away from tiny spots during curing. Once you know what caused them, the repair is straightforward.
This beginner repair guide walks through how to inspect the surface, choose the right fix, sand safely, add a fresh top coat, and prevent dimples on your next pour. If you are still getting comfortable with measuring, mixing, and curing epoxy, start with our [Resin Art Beginner's Guide](/articles/resin-art-beginners-guide-2026/) first. For a wider list of common problems, keep our [Resin Art Troubleshooting Guide](/articles/resin-art-troubleshooting-guide/) nearby while you work.
How to Fix Resin Dimples After Curing
The easiest way to fix resin dimples after curing is to sand the surface level, clean away every bit of dust, and pour a thin fresh layer of clear resin over the top. This works best when the resin is fully hard, the dimples are shallow, and the project is a flat piece such as a coaster, tray, bookmark, pendant face, ornament, or small art panel.
Use this quick repair plan:
Do not sand resin that feels sticky, gummy, rubbery, or wet. If your project has tacky areas too, read our guide on [how to fix sticky resin after curing](/articles/fix-sticky-resin-after-curing/) before attempting a dimple repair.
What Resin Dimples Look Like
Resin dimples are small depressed areas in the cured surface. They may look like pinholes, tiny bowls, shallow craters, fish eyes, or uneven glossy spots. Sometimes they are obvious only when light hits the surface from the side. Other times they collect polish, dust, or pigment and become easy to see.
Dimples are different from deep bubbles trapped inside resin. A bubble sits under the surface and may look round or cloudy. A dimple is on the surface itself. When you run a gloved fingertip across the project, you can usually feel a dip.
Common places to find dimples include:
- Around dried flowers, paper, shells, stickers, or other embedded items
- Near the edge of a coaster or tray
- On top of resin jewelry pieces
- Around glitter clumps or mica-heavy areas
- In a fresh clear coat poured over an older cured layer
If the rest of the piece is solid and well-cured, dimples are usually cosmetic. That makes them one of the more forgiving resin problems to repair.
Why Resin Gets Dimples After Curing
Dimples happen when resin cannot level into a smooth continuous surface. The cause may be something physical on the surface, something mixed into the resin, or something about the workspace.
Dust and lint are common culprits. A tiny speck can interrupt the resin surface tension and leave a low spot as the resin cures. This is especially common when pieces cure uncovered.
Oil or silicone contamination can also repel resin. Fingerprints, hand lotion, silicone mold release, residue from cleaning sprays, and some plastic tools can create little circles where resin pulls away.
Air bubbles near the surface can pop late in the cure window and leave tiny pits behind. This often happens when resin is cold and thick, when porous items were not sealed first, or when the mixed resin was stirred too aggressively.
Too much heat from a torch or heat gun can overwork the surface. A quick pass is helpful for bubbles, but lingering heat can thin the resin unevenly, push it around, or make the top skin cure strangely.
An unlevel workspace can create thin spots. If the resin flows toward one side, some areas may not have enough material to self-level properly, leaving shallow dips.
For projects with embedded flowers, paper, or stickers, preparation matters. Our tutorial on [how to preserve flowers in resin](/articles/how-to-preserve-flowers-in-resin/) explains how to dry and seal botanicals so they do not release moisture or air into the pour.
Supplies You Need for a Dimple Repair
You do not need a professional studio to fix resin dimples after curing. A small repair kit is enough for most beginner resin pieces.
Recommended supplies:
- Nitrile gloves: $8-$15 per box
- Safety glasses: $5-$12
- 91% isopropyl alcohol: $3-$8
- Lint-free cloths or microfiber towels: $5-$12
- Wet/dry sandpaper assortment, 400-1000 grit: $6-$15
- Optional finer sandpaper, 1500-3000 grit: $6-$15
- Clear UV-resistant art resin: $15-$45 for a small kit
- Graduated mixing cups: $6-$12
- Silicone stir sticks or disposable craft sticks: $4-$10
- Small heat gun or butane torch: $15-$35
- Plastic storage bin or clean box for a dust cover: $5-$15
- Mini level: $5-$10
If you plan to repair several coasters, trays, or jewelry pieces, the most useful upgrades are a good sandpaper assortment, a reliable clear resin, and a dust cover. Those three items solve many surface issues beyond dimples. Our [Resin Art Essential Tools](/articles/resin-art-essential-tools/) guide covers a full beginner setup if you are building your supply shelf slowly.
Step-by-Step Dimple Repair Method
Start only after the resin is fully cured. Many art resins feel firm after 24 hours but need 48-72 hours before they are ready for sanding. If the surface still smells strong, bends easily, or feels tacky, wait longer.
Step 1: Inspect the surface
Hold the piece near a window or under a desk lamp. Tilt it slowly so the light skims across the surface. Mark the dimpled areas with tiny pieces of painter's tape along the side, not directly on the resin surface.
Step 2: Clean before sanding
Wipe the project with a lint-free cloth dampened with isopropyl alcohol. This removes hand oils and loose dust. Let it dry completely. Sanding a dirty surface can grind residue into the resin.
Step 3: Wet-sand the dimples
Use 400 or 600 grit wet/dry sandpaper for shallow dimples. Dip the sandpaper in clean water and sand gently in small circles. Keep the surface wet so dust stays controlled. Your goal is not to remove a lot of resin. You only need to dull the glossy surface and blend the low spots enough for a new coat to grip.
If the dimples are very shallow, 800 grit may be enough. If they are deeper, start with 400 grit and move to 600 or 800 afterward. For a detailed finishing process, see our guide on [how to sand and polish resin art](/articles/how-to-sand-and-polish-resin-art/).
Step 4: Rinse and dry thoroughly
Rinse the piece or wipe it clean with a damp cloth. Dry it well, then let it sit for a few minutes so water cannot hide in edges, holes, or hardware openings. Water left on the surface can cause fresh cloudiness or new dimples.
Step 5: Clean with alcohol
Wipe once more with isopropyl alcohol and a lint-free cloth. Do not touch the top surface with bare fingers after this point. Oils from your skin can create new fish eyes.
Step 6: Mix a small fresh batch of resin
Measure exactly according to your resin brand. Stir slowly for the full recommended time, scraping the sides and bottom of the cup. For small repairs, it is tempting to guess the amount, but accurate measuring matters even more in tiny batches.
Step 7: Pour a thin clear coat
Pour resin into the center and use a stir stick or silicone brush to guide it outward. For coasters and trays, push resin close to the edge without flooding over. For jewelry, use a toothpick to add small drops until the surface domes slightly.
Step 8: Remove bubbles and cover
Pass a heat gun or torch quickly over the surface from several inches away. One or two quick passes are enough. Cover the piece with a clean box or plastic bin and let it cure on a level surface.
Fixing Deep Dimples, Pinholes, and Edge Craters
Some dimples are too deep for a simple flood coat. If you pour a thin layer over a deep pinhole, the new resin may sink into the hole and still leave a mark. In that case, fill the low area first.
For deep pinholes, use a toothpick to place a tiny drop of mixed resin directly into each hole. Let those drops settle for a few minutes, then add your thin top coat over the entire surface. This helps the final coat level evenly.
For edge craters, raise the piece on small cups or painter's pyramids and tape the underside edge before pouring. A small amount of resin may drip over the side, but the tape makes cleanup easier. Once the piece is partially cured but still flexible at the drip, trim the edge with a craft knife. If it is already fully hard, sand the drip smooth.
For resin jewelry, work slowly. Small pendants and earrings can overflow quickly. Add resin with a toothpick or needle-tip bottle rather than pouring from a cup. Our beginner tutorial on [how to make resin earrings at home](/articles/how-to-make-resin-earrings-at-home/) is a useful reference for controlled small pours.
How to Prevent Resin Dimples Next Time
Prevention starts before the resin bottle opens. A cleaner setup and calmer pouring routine make a big difference.
Level your workspace. Use a mini level on your table and on the mold or board itself. Shim the corners with cardboard if needed.
Warm the resin bottles. Place sealed bottles in warm water for 10-15 minutes before mixing. Warm resin flows better and releases bubbles more easily. Do not use hot water, and dry the bottles before opening them.
Clean molds and surfaces. Wipe molds, coaster blanks, tiles, and trays with isopropyl alcohol. Let them dry fully. Avoid silicone-heavy sprays unless your project specifically needs mold release.
Seal porous items. Paper, wood, dried flowers, shells, and fabric can release air into resin. Seal them first with Mod Podge, clear acrylic spray, or a thin resin seal coat. Let the sealant dry before embedding.
Mix slowly. Fast stirring whips in bubbles. Stir deliberately and scrape the cup well. If your resin is bubble-prone, let the mixed cup sit for 2-3 minutes before pouring.
Use heat lightly. A torch is a bubble tool, not a cooking tool. Keep it moving and avoid repeated heavy passes.
Cover the curing piece. Dust that lands during the first few hours can create surface flaws. A clean storage bin turned upside down is one of the cheapest and best resin tools you can own.
These habits are especially helpful for flat projects like coasters. If you want a beginner-friendly project to practice on, try our [resin coaster project ideas](/articles/resin-coaster-project-ideas/) after you finish this repair.
When to Recoat vs. When to Polish
A fresh resin coat is the easiest way to restore a glassy finish after sanding, but it is not the only option. You can also sand through finer grits and polish the surface by hand or with a small buffing tool.
Choose a fresh top coat when:
- The dimples are visible across a large flat surface
- You want a high-gloss finish with minimal buffing
- The piece has shallow scratches along with dimples
- You are repairing coasters, trays, bookmarks, or panels
Choose sanding and polishing when:
- The item is too small for another resin layer
- Extra thickness would affect fit, weight, or hardware
- The surface is curved or detailed
- The dimples are extremely shallow
Polishing takes patience, but it gives you more control over final thickness. Recoating is faster for beginners and usually gives the most dramatic improvement.
Frequently Asked Questions
Can you fix resin dimples after curing?
Yes. You can usually fix resin dimples after curing by wet-sanding the surface, cleaning it thoroughly, and adding a thin fresh coat of clear resin. Deep pinholes may need to be filled with a small drop of resin before the final top coat.
Why did my resin cure with tiny craters?
Tiny craters usually come from dust, silicone or oil contamination, late-popping bubbles, an unlevel surface, or too much heat from a torch. Resin pulls away from contaminated spots and cures around them, leaving small low areas.
Do I have to sand before adding another layer of resin?
If the previous layer is fully cured, sanding is strongly recommended. A lightly sanded surface gives the new resin something to grip. Clean away all sanding dust before recoating so the new layer cures clear and smooth.
Can I use clear nail polish to fix resin dimples?
Clear nail polish may hide a tiny mark on a practice piece, but it is not the best repair for finished resin art. It can yellow, peel, or react differently than epoxy. A properly mixed resin top coat is more durable and looks more consistent.
Why do dimples come back after I recoat resin?
If dimples come back after recoating, the surface was probably still contaminated, dusty, wet, or oily. Clean more thoroughly, avoid touching the surface, use fresh lint-free cloths, and cover the project while it cures. Also check that your table is level.
Final Thoughts on Fixing Resin Dimples After Curing
Learning how to fix resin dimples after curing gives you a practical rescue skill for coasters, jewelry, trays, bookmarks, and small art panels. Let the piece cure fully, sand gently, clean carefully, and add a thin clear coat. Most shallow craters disappear under a well-poured repair layer.
The real win is prevention. Clean your surface, seal porous items, mix slowly, use heat with restraint, and cover your project while it cures. Once those habits become routine, your resin pieces will come out smoother, glossier, and easier to finish.