Authored by Nitesh

CNC machining is a subtractive process, which means the finished products can have visible tool marks from the grinding and turning equipment. A seamless appearance is achieved by consistent surface polishing.

The machined part’s appearance, durability, and roughness can be improved by applying appropriate surface treatments afterward. The high-end surface finishes are a plus whenever they’re put to good use.

Types of Surface finishing processes

  • Anodizing

Anodizing is a procedure used to treat metal surfaces that enhances the thickness of the metal’s natural oxide layer. It is often used on aluminum and titanium parts to improve their corrosion resistance and provide a harder surface. Anodized parts can also be dyed in different colors.

  • Black oxide

Black oxide is a finish applied to ferrous metals (metals containing iron) through a chemical reaction. The finish provides a thin layer of protection against corrosion and is black and often used on steel parts for decorative purposes.

  • Electroless nickel plating

It is a process in which a layer of nickel is deposited on the surface of a metal using a chemical reaction. The finish provides good wear and corrosion resistance and can be used on various metals. It is commonly used in the automotive and aerospace industries.

  • Powder coating

It is a process in which a dry powder is applied to the surface of a metal and then cured under heat. The finish provides a hard, durable surface resistant to chipping, scratching, and fading. Powder coating can be applied in a wide range of colors and textures.

  • Polishing

Polishing is a surface finish that uses abrasives to remove imperfections and create a smooth, shiny surface. It can be achieved through manual or machine-assisted methods and is commonly used on metal parts for decorative purposes.

  • PVD Coating

PVD coating can be used to improve the performance and lifespan of cutting tools. CNC machining involves using cutting tools, such as end mills and drill bits, to shape and finish materials. These cutting tools can be coated with PVD coatings to improve their properties, such as their wear, heat, and corrosion resistance. PVD coatings can also improve the surface finish of the parts being machined and make them more durable.


The last step in the entire CNC machining process is surface finishing, and this aids in removing imperfections and improving the overall look of the components. When it comes to creating beautiful and functional CNC machining parts, is your one-stop shop. is here to help you save time and effort by quickly matching you with the ideal partner. As a result, production time and costs will be reduced. This method is designed to assist you in concentrating on producing higher-quality goods.

If you require specialized knowledge for your production goals. Join our digital platform and begin your journey today.