Nylon can be CNC-machined to produce a surprisingly wide range of surface finishes, each with special aesthetic and functional properties. Here's a rundown of the most common options:

1. As-Machined: This is the unfinished product that was just finished being machined; it has a somewhat rough texture and obvious tool marks. This option is the most economical one and is appropriate for parts where functionality supersedes aesthetics. As-machined parts can be bead blasted or given a light sanding to enhance their appearance.

2. Bead Blasted: To achieve a smooth, matte finish that is extremely resistant to wear, the part is saturated with tiny glass or plastic beads. It's a well-liked option for removing tool marks and producing a smooth but slightly uneven surface. Additionally, bead blasting strengthens paint adherence and produces a firm grip.

3. Chemical Smoothing: The outermost layer of nylon is dissolved and removed using chemical agents, leaving a smooth and glossy surface in its place. It provides excellent optical clarity, making it perfect for transparent or translucent parts. It is not appropriate for all varieties of nylon and might call for specific expertise.

4. Media Tumbled: Comparable to bead blasting, but using tumbling media such as ceramic chips or walnut shells for a rounded, softer finish. Perfect for softening edges and giving an appearance more natural. Appropriate for skin that will be touched or near skin.

5. Vibratory Finishing: Polishes and deburrs the part using a vibrating tub filled with abrasive media, leaving it with a smooth, slightly glossy finish. Compared to bead blasting, it offers a better surface finish and is more successful in reaching internal cavities. Perfect for parts that need to be sized and shaped with a high degree of precision.

6. Painting and Coating: It is simple to paint or coat nylon to alter its color, texture, and other properties like UV and waterproofing protection. provides a multitude of options that are aesthetically pleasing and can improve practical qualities. It adheres better and lasts longer when the surface is properly prepared and the right coating is chosen.

You will choose the surface finish for your CNC machining nylon parts based on several factors, including your application, intended aesthetics, functional requirements, budget, and others. Making the right decision for your unique needs can be aided by speaking with a certified CNC machining service provider.