Nail Files and Buffers: Which Grit Should You Use?

By the Nove Academy Team | Nove Wholesale

Files and buffers may look alike on the table, but their surfaces do different jobs. The grit number is a useful starting point: choose for the material you are working on, then use light, controlled strokes.

If you remember one thing, keep coarse files on enhancement product and choose a fine file for natural nails. A file that removes gel quickly can also thin a natural nail quickly.

The quick answer: Choose a fine 240-grit file for natural-nail shaping and prep when the maker recommends it. Use coarser files such as 150 grit only on enhancement product, never to shorten or rough up the natural nail. A buffer smooths or polishes; follow its labelled sides and replace worn abrasives.

What the grit number tells you

Grit describes how coarse or fine an abrasive surface is. In the same file range, a lower number generally means a coarser surface and a higher number a finer one. A coarse file removes material faster; it also needs a steady hand and a suitable surface.

Akzéntz describes its 100-grit files as useful for shaping and removing bulk, 150 grit as a multi-use grit between 100 and 180, and 180 grit for refining shapes and smoothing surfaces. The same manufacturer identifies 240 grit for natural-nail shaping and prep. Use the instructions for the exact file and service rather than assuming every brand defines each grit in the same way.

Pro Tip from Nove Academy: A grit number is not a pressure setting. Pressing harder does not make the file more precise; it makes it easier to over-file.

Choose for the surface in front of you

For a natural nail, protect the plate. Use a fine file for length and edge shaping, and only buff the surface when your chosen service protocol calls for it. If a natural nail is already thin, tender, peeling, or damaged, avoid extra surface filing and do not try to correct it by removing more layers.

Silkline - 240/240 Grit - Cushion File - Black

A fine file such as Silkline - 240/240 Grit - Cushion File - Black gives you a clearly labelled option when your service calls for 240 grit. Keep it separate from coarser enhancement files so the right tool is easy to pick up.

For an acrylic or hard-gel enhancement, a coarser file may be used to refine the product or reduce bulk, but stop before reaching the natural nail. Near the natural nail and sidewalls, change to a finer abrasive and lighten your touch. Soft-gel or other systems can have different filing and removal requirements, so follow that system’s instructions.

• Natural nail length and edge shaping: choose a fine grit identified for natural nails, such as 240 grit in Akzéntz’s file guidance.
• Enhancement product shaping: choose the grit and file recommended for that product, keeping the abrasive on the enhancement.
• Surface finishing: a fine file or buffer may smooth product after shaping; remove dust and check the contour as you work.
• Do not use a foot file, e-file bit, or coarse enhancement file on the natural nail just because it is available at the station.

Akzentz - White Buffing Block - 240/240 Grit

This 240/240 Akzéntz buffing block gives you a fine-grit option for careful finishing. Keep pressure light and follow the service system for when and where to buff.

Akzentz - 150/150 Grit - Curved File

A 150/150 curved file offers a multi-use grit for shaping enhancement product. Keep it on the enhancement and use a finer grit as you refine near the natural nail.

Shape with control

1. Start with clean, dry nails and decide the shape before filing. Check the length and sidewalls from the front so you can see whether both sides are balanced.
2. Support the finger so it does not move. Hold the file steadily and use short, light strokes on the free edge. Turn the finger to check the opposite side rather than twisting the file into the sidewall.
3. Work across the edge in a consistent direction and angle. Keep the sidewalls straight or tapered according to the chosen shape; do not file deeply into the corners.
4. Pause often to view the nail from the top and front. A small adjustment is easier than trying to correct an uneven shape after removing too much.

You do not need to saw rapidly back and forth. Controlled strokes give you more feedback and help you notice when you are close to the natural nail or a product’s structure.

When a buffer helps

A buffer is for smoothing or polishing a surface, according to the tool’s design. Some are one-sided; others have several labelled faces or colors. Follow the printed sequence on the actual buffer. Do not guess the grit or job from a color alone.

On natural nails, repeated buffing can remove nail layers. Use the lightest touch and fewest passes needed, and skip surface buffing if the service instructions do not call for it. For enhancements, a buffer can help refine a filed surface, but it should not replace the file needed to shape product.

Silkline - 4 Sided Buffer

Four working faces give you options in one buffer. Check the labels on the exact tool to match each side to your task.

Keep the file useful and the service clean

A file becomes less predictable as its abrasive wears down or clogs with product dust. Replace a worn tool instead of pressing harder. Keep single-use files for one client and use only tools that your salon’s cleaning and disinfection process allows to be reprocessed.

Some file makers label particular files washable or sanitizable; that does not mean every file can be soaked or disinfected. Check the specific manufacturer’s directions and your local salon rules. Clean reusable tools between clients as directed, and discard porous or damaged abrasives where required.

Pro Tip from Nove Academy: Store files dry and away from dust. Keep grit labels visible so a coarse enhancement file does not get mixed up with a fine natural-nail tool.

Silkline - Mini Disposable Buffing Blocks Pink - 50 Pack

For single-client enhancement-product work, Silkline - Mini Disposable Buffing Blocks Pink - 50 Pack give you a small 150-grit option when that abrasive suits the service. The compact format is easy to set out with one client’s supplies; discard the block after use.

Common filing problems and how to adjust

• The natural nail feels hot, sore, or unusually thin: stop. Do not continue to smooth it. Reassess the technique and service plan before applying more product.
• The sidewalls look uneven: check the finger from the front and make a small correction on the enhancement only. Avoid filing into the natural nail’s sidewalls.
• The surface looks scratched after filing: the abrasive may be too coarse for that product stage. Move to the finer grit specified by the system, then clear dust and inspect again.
• The buffer seems to do nothing: check whether it is worn or whether the selected side is intended for that surface. Do not compensate with extra pressure.

If the product system specifies a particular grit, file type, or surface-preparation method, that instruction takes priority. Nail plate condition, enhancement material, and service stage all affect which tool is appropriate.

Akzentz - 180/180 Grit - Curved File

Once the enhancement shape is in place, Akzentz - 180/180 Grit - Curved File offers a finer abrasive for refining shapes and smoothing surfaces. Use it at the stage your product system specifies rather than trying to soften scratches with extra pressure.

A Few Common Questions

Is a 100-grit file safe on natural nails?

A 100-grit file is coarse and is intended for shaping and removing bulk from enhancement product in the Akzéntz guidance. Do not use it on the natural nail. Choose a fine natural-nail file and follow the exact service instructions.

What grit should I use to shape a natural nail?

Use a fine grit identified for natural-nail shaping by the file maker. Akzéntz identifies 240 grit for natural nail shaping and prep. Your chosen service system may have additional instructions.

Can I buff natural nails until they shine?

Avoid repeated buffing. It removes surface layers, and the shine is not worth thinning the nail. Use only the lightest buffing required by your service directions, or skip it.

What is the difference between a file and a buffer?

A file shapes or refines the edge and product. A buffer smooths or polishes, depending on its grit and labelled sides. Some tools combine both jobs, so read the exact product directions.

Can I reuse a nail file between clients?

Only when the specific file is designed for reuse and its maker’s cleaning directions and your local rules allow it. Do not assume a file is disinfectable because it looks washable.

When should I replace a file?

Replace it when it is worn, damaged, clogged, or no longer files evenly. A dull abrasive encourages extra pressure and makes your work harder to control.

Let the grit do the work

The right file feels easier because it suits the surface and the stage of the service. Keep coarse grits for enhancement product, protect natural nails with fine tools and a light touch, and check the maker’s instructions whenever you change systems.

Explore our Nove Academy Guides for more practical product and technique advice, or ask the Nove team for help choosing products for your service.

Helpful References

• Akzéntz — White Classic File
• Nove: Akzéntz White Buffing Block 240/240
• Nove: Akzéntz 150/150 Curved File
• Nove: Silkline 4 Sided Buffer

Professional education from Nove Academy. Follow your training and the current instructions for your exact products and equipment. Product availability can change.