In the final stage of product development, the refinement of surface texture directly determines the success or failure of a design. Our finishing department brings together professional technicians with years of industry experience to provide manual sanding and polishing solutions that transcend mechanical limits for parts produced via 3D printing, CNC machining, or vacuum casting. Through extensive material knowledge and diverse techniques, we propose surface treatment paths to our clients that best embody the product's value.

In ARRK's craft process, we place high importance on "Design for Finishing." Manual finishing is not merely simple sanding; it is a technological integration of digital analysis and physical characteristics.

As early as the design stage, we consider the impact of material shrinkage, wall thickness, and surface tension on subsequent polishing. Through these scientific processing methods, we effectively avoid common "surface rippling" or "dimensional offset" issues found in traditional machining. Combined with a strict QCD (Quality, Cost, Delivery) management system, we are not just refining parts; we are supporting our clients in shortening the validation cycle for product market launch.

Q: Is it possible to ensure grinding precision even for parts with complex structures or deep holes?

A: This is the greatest strength of manual finishing. For slits, complex curves, or extremely small radii that are difficult for machines to reach, senior technicians use their refined tactile sense and specialized tools to ensure every detail meets the flatness required by the design.

Q: We have extremely high requirements for CMF (Color, Material, Finish). Can manual processing perfectly reproduce them?

A: Yes. We perform multi-stage sandpaper sanding (#400 - #3000) tailored to different subsequent processes (such as painting, plating, or sandblasting) to ensure the base surface is completely flat, allowing the final product to accurately reproduce the texture and luster required by the designer.

Q: For transparent materials, how do you ensure the light transmittance is equivalent to optical parts?

A: We provide optical-grade mirror polishing technology. By strictly controlling friction heat and polishing compounds, we can completely eliminate machining marks, restoring PC or PMMA materials to their highest transparency without sanding tracks or ripples.