Leather Dyeing & Finishing
How to Sand Leather Before Refinishing
Sand leather lightly before dye or paint: which grit makers use (220 to 1200), a water-drop test, step-by-step prep, and leather dust safety.
Sand leather before refinishing only lightly, and only where a finish or gloss stops new color from taking. Clean it, run a water-drop test, then scuff with fine sandpaper and wipe off every trace of dust before you dye or paint. Makers recommend anything from 220 to 1200 grit, depending on the job.
This guide is part of our leather dyeing and finishing series.
Key takeaways- Clean and dry the leather before you sand.- If water soaks in, the surface is ready; if it beads, the finish must come off.- Press lightly: hard sanding turns grain into suede.- Don't use abrasive pads on aniline or pull-up leather.- Leather dust is classed as a human carcinogen, so control the dust.
Do you need to sand at all?
Not always. Put a few drops of water on an undamaged spot. If it soaks in and darkens the leather, the surface can take color. If it sits on top, there's a finish to remove. The same water-drop test tells you whether leather will take dye.
A deglazer or alcohol is the first way to remove a finish. Golden, a paint maker, suggests light sanding with fine sandpaper only if alcohol doesn't remove the coating. Sanding earns its place on glossy worn patches, cracked topcoats and dried crack filler. Leather Repair Company notes that cracking is usually in the surface coating, rarely in the leather itself.
What grit sandpaper to use on leather
Makers give different numbers because they're doing different jobs. All of them sand lightly.
If you're following one product system, use its grit. If not, try the finest of these grits on a hidden spot first.
| Grit | Who recommends it | For what | Fact |
|---|---|---|---|
| 220 | Angelus | Scuffing leather furniture before paint, focusing on glossy areas | – |
| 400-600, wet | Leatherique | Smoothing minor surface flaws on finished leather before its dye | – |
| 1200 | Leather Repair Company | A light sand before any color goes on | – |
| "Fine grit" (no number) | Clyde's, Dharma Trading | Blending dried crack filler and smoothing scuffs | – |
| 1,500, dry | Leatherique | Touching up brush marks after dyeing | – |
Tools and materials
- Fine sandpaper (see the table)
- Leather cleaner and a soft cloth
- Deglazer or rubbing alcohol on a rag
- Crack filler, if you have cracks
- Safety glasses and disposable gloves
How to sand leather, step by step
Step 1: Test a hidden spot
Leather Collection's care advice is to test any product on a hidden area first. Do the same with your sandpaper, so you see how the grain reacts.
Step 2: Clean and dry the leather
Dust it, wipe it with a damp cloth, clean it with leather cleaner, and let it dry completely.
Step 3: Run the water-drop test
Drops soak in: go to step 5. Drops bead: remove the finish first.
Step 4: Deglaze before you sand
Wipe with alcohol or deglazer on a rag, not poured on the leather. Rub 'n Restore says lacquer thinner is the next step up, and acetone is the most aggressive and can bleach absorbent leather. Repeat until the water test shows the surface absorbs.
Step 5: Sand lightly in small circles
Sand gently in circles, paying extra attention to glossy areas. Don't press hard enough to create suede or wipe out the grain. On aniline or pull-up leather, skip abrasive pads.
Step 6: Fill and sand cracks
Spread a thin layer of leather filler into cracks and let it dry. Then sand it gently with fine-grit paper until it blends with the surrounding leather.
Step 7: Remove every trace of dust
Wipe off all the dust. Leather Repair Company follows sanding with an alcohol cleaner applied to a cloth rather than straight onto the leather. Then move on to how to paint leather or how to dye leather.
Leather dust and solvent safety
The International Agency for Research on Cancer (IARC) classifies leather dust as a human carcinogen (Group 1), linked to cancer of the nasal cavity and sinuses, as the EU Roadmap on Carcinogens explains. An earlier IARC evaluation found the highest nasal cancer risk among boot and shoe workers in the dustiest operations. Sanding and buffing make the most dust.
Those findings come from workplaces. The workplace advice is to control dust at the source with extraction, clean surfaces regularly, keep clothes and hands clean, and treat a respirator as the last line of defense.
Deglazers bring their own hazards. Acetone, a common deglazer solvent, has a flash point of 0°F and can irritate eyes, nose and throat. The US EPA advises extra ventilation when using solvents.
Common mistakes
For worn leather that needs a full color refresh, see redyeing worn leather.
| Mistake | What happens | Fact |
|---|---|---|
| Pressing hard | Grain turns fuzzy and suede-like | – |
| Abrasive pads on aniline or pull-up | Too abrasive for fine surfaces | – |
| Sanding instead of deglazing | The gloss is often a finish that alcohol or deglazer removes | – |
| Leaving wax, silicone or oil behind | Leatherique says to confirm it's all gone before dyeing | – |
| Sanding to go lighter | Dye won't take dark leather very light | – |
| Skipping an adhesion test | Rub 'n Restore stress-tests 2-3 thin coats in a hidden spot by pinching, scuffing and scratching | – |
Refinishing a jacket you bought?
Test anything you put on a garment on a hidden area first; that's the general rule on Leather Collection's care page. The store sells no sandpaper, dyes or paints. For day-to-day care of a jacket, start with the Leather Collection care instructions.
Quick answers
When sanding, do you start with higher or lower grit?
For leather prep, start fine. The makers above use 220 to 1200 grit for prep, and Leatherique goes finer still, to 1,500, for touch-ups after dyeing.
How do you tell when you're done sanding?
When the gloss is dulled evenly and the water-drop test shows the surface absorbs. Stop before the grain turns fuzzy.
hosob Editorial Team
hosob articles are researched from published sources, cited in the text, and reviewed before publication.