The part retains its CNC-machined surface, and visible tool paths may remain. This option avoids an additional coating when the application does not require one.

Specify: roughness requirements, critical dimensions, deburring and acceptable tool-mark appearance.

Important distinction: an as-machined finish does not automatically mean the highest accuracy. Dimensional and surface requirements still need to be defined.

Bead blasting changes the surface texture and can make visible areas appear more uniform. The result depends on the starting surface, media and process conditions.

Specify: a texture reference or approved sample, visible surfaces and areas to protect during blasting.

Consider: blasting should not be assumed to remove every machining mark. Review the required preparation and any subsequent coating.

Anodizing converts the aluminum surface into an oxide layer. Type II sulfuric anodizing is commonly selected for protective and decorative finishes; Type III hardcoat is considered for wear-focused applications.

Specify: alloy, type, thickness, color and any required sealing or masking.

Consider: the process affects final dimensions. Bores, threads, mating surfaces and electrical contact areas should be reviewed before machining and finishing.

Powder coating adds a cured polymer film to the metal surface. Color, texture and protective performance depend on the selected coating system and application.

Specify: substrate, pretreatment, coating thickness, color reference, gloss and service environment.

Consider: added film thickness can affect fits and threads. Define masked areas and appearance acceptance before production.