CNC Surface Finishes

Surface finishing is a process that helps define and refine the overall texture after CNC machining. At RP Group we offer a wide range of surface finishing options for your projects.

We can help you select the right finishes for your applications.

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CNC Machining Surface Finishes at RP Group

Surface Finish

Type II Anodizing








Type III Anodizing








Alodine







Black Oxide



Media Blasting



Passivation





Electroless Nickel Plating


Zinc Plating





Powder Coating





Electropolishing


Tumbling


Applicable Materials

Aluminium






Aluminium







Aluminium






Steel, Stainless Steel


Aluminium, Steel, Stainless Steel, Brass, Bronze, Copper

Steel, Stainless




Aluminium, Steel, Stainless Steel

Steel, Stainless Steel




Aluminium, Steel, Stainless Steel



Aluminium


Aluminium, Steel, Stainless Steel

Colors

Clear, Black, Blue, Gold, Red





Black, Clear (looks grey with thicker coatings)





Clear, Gold






Black


N/A



N/A




N/A


Clear, Light Blue coating, Black, Glossy Black coating

Black (20% or 90% gloss), White (20% or 90% glosss)

N/A


N/A





Texture

Smooth matte finish, does not cover machine marks unless media blasted beforehand


Smooth matte finish, does not cover machine marks unless media blasted beforehand



Smooth matte finish, does not cover machine marks unless media blasted beforehand


Smooth, matte black


Matte finish



Smooth, glossy finish



Smooth, glossy finish

Smooth finish, does not hide machine marks


Gloss or Semi-gloss




Smooth, glossy finish

Slightly rounded edges, smooth, slightly matte finish, does not hide all machine marks

Can be applied with

Media Blasting, Tumbling, Alodine (masking required)




Media Blasting, Tumbling, Alodine (masking required)





Media Blasting, Tumbling, Type II Anodizing (masking required), Type III Anodizing (masking required)

Media Blasting, Tumbling, Passivation

Any post processing



Black Oxide, ENP, Electropolish, Zinc Plating, Tumbling, Media Blasting

Alodine


Media Blasting, Tumbling, Passivation



Media Blasting, Tumbling (neither is needed)



Passivation, Tumbling


Any finish



Coating Thickness

0.0002 - 0.0012






Must be thicker than 0.001 (can be up to 0.004)
























0.0003 - 0.002


















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