Efficient & Stable Surface Finishing Services
From matte bead blasting to aerospace-grade anodizing, Allied Metal transforms raw CNC parts into final, market-ready components. Tailored for B2B brands with strict quality and aesthetic requirements.
- 20+ Years Combined Experience
- 100+ Materials Processed
- Strict International QC Standards
- Fast Turnaround (7-10 Days)
Enhance, Protect, and Perfect Your Components
A high-quality finish is the final, critical step in manufacturing. It’s the first thing your customers see and it provides essential protection for long-term performance.
Superior Aesthetics
Achieve the perfect look and feel, from a mirror-like polish to a uniform matte texture or vibrant, custom colors.
Enhanced Durability
Increase resistance to corrosion, wear, abrasion, and chemical exposure, significantly extending the life of your parts.
Added Functionality
Introduce new properties such as electrical conductivity/insulation, lubricity, hardness, and biocompatibility.
Our Core Surface Finishing Services
We handle everything from basic functional finishes to highly complex cosmetic finishes for critical industries.
| Surface Finish | Description | Tool Marks / Roughness | Typical Applications |
|---|---|---|---|
| As-Machined raw CNC finish | Default surface straight from the CNC machine, no post-processing. Roughness is defined by cutting tool and parameters. | Visible tool marks, Ra 0.3–1.6 µm non-cosmetic | prototypesfunctional partsnon‑aesthetic |
| Smooth Machining abrasive refinement | Light abrasive removal of the top layer to reduce roughness and imperfections. Can be done manually or automated. | Light visible scratches, improved uniformity non-cosmetic | consumer electronicsmechanical componentsmedical devices |
| Fine Machining high‑precision | Higher‑accuracy cutting/grinding to minimise tool marks, delivering a finer metal surface. | Slightly visible, Ra 0.2–0.8 µm non-cosmetic | precision partsmating surfaces |
| Polishing gloss / mirror | Mechanical removal of surface material to achieve a smooth, high‑gloss finish — up to mirror quality. | Primary surface marks removed, Ra ≤ 0.1 µm ✨ always cosmetic | decorative partsreflective surfaceslow‑friction |
| Bead Blasting glass bead | Fine glass beads or media blasted onto the surface to create a uniform matte/satin finish, removing tool marks. | Secondary marks removed; primary (cosmetic) removed 📋 cosmetic on request | consumer productsdecorative parts |
| Brushing directional texture | Abrasive belts or brushes create a unidirectional satin/matte texture, masking minor surface defects. | Reduced on non‑primary surfaces, directional grain 📋 cosmetic on request | stainless steel / aluminium trimappliances |
| Sanding Type II aluminium prep | Aluminium‑specific sanding to reduce roughness on non‑primary surfaces, often as a base for anodizing. | Reduced on non‑primary surfaces, uniform matte 📋 cosmetic on request | aluminium housingsanodizing substrate |
| Sanding Type III anodizing prep | Aluminium sanding that remains visible under anodizing, meeting industrial durability standards. | Visible under anodizing non-cosmetic | aerospaceindustrial parts |
| Black Oxide conversion coating | Hot alkaline process for steel/iron forming a matte black oxide film; corrosion resistance enhanced with sealant. | Visible, uniform black non-cosmetic | fastenerstoolsoptical components |
| Chromate Conversion aluminium primer | Chemical conversion coating for aluminium, providing corrosion resistance and an excellent paint base. | Visible, light gold/clear non-cosmetic | aerospaceelectronicspaint primer |
| Electroless Nickel autocatalytic | Chemical auto‑catalytic deposition of a uniform nickel layer on complex geometries and non‑conductors. | Reduced but visible, uniform satin non-cosmetic | complex cavitiesnon‑conductor plating |
| Anodizing electrochemical oxide | Electrochemical process that thickens the natural oxide layer on aluminium; can be dyed, improves corrosion resistance and insulation. | Type III visible; Type II cosmetic on request 📋 cosmetic on request (Type II) | aerospaceelectronicsautomotive |
| Powder Coating electrostatic dry | Electrostatically applied dry powder, heat‑cured to form a thick, durable, chip‑resistant uniform coating. | Fully covered, no visible marks non-cosmetic | outdoor equipmentindustrial enclosuresautomotive |
| Electroplating electrolytic deposit | Electrolytic deposition of metal (zinc, nickel, chromium etc.) to enhance wear, corrosion resistance and conductivity. | Reduced but visible, adjustable gloss non-cosmetic | electrical terminalsmechanical partsdecorative chrome |
| Passivation stainless steel | Chemical treatment for stainless steel to remove free iron and form a passive oxide layer, boosting corrosion resistance. | Virtually mark‑free, retains original luster non-cosmetic | medicalfood equipmentpharmaceutical |
| PTFE / Teflon Coating low‑friction | Polytetrafluoroethylene coating that provides low friction, non‑stick, and chemical‑resistant performance. | Covered, smooth, mark‑free non-cosmetic | chemical sealsbearingsnon‑stick molds |
| Sandblasting abrasive blasting | High‑pressure sand / media impact to produce a uniform coarse‑to‑fine matte texture, removes rust or old coatings. | Uniform matte, roughness controllable 📋 cosmetic on request | surface prepdecorative texture |
| Tumbling barrel finishing | Batch rolling with abrasive media to uniformly smooth surfaces, deburr edges – ideal for medium‑to‑large volumes. | Uniformly smooth, rounded edges non-cosmetic | high‑volume hardwaredeburring |
Rigorous Inspection Hardware & Standards
We ensure that every batch of surface-treated parts conforms strictly to client specifications through advanced metrology equipment.
Coordinate Measuring Machines verify complex dimensional tolerances down to micron levels post-finishing.
Verifies alloy composition and hardness to ensure substrate integrity prior to coating applications.
Optical inspection for surface profiles, thread pitches, and intricate geometric contours.
Non-destructive magnetic and eddy-current testing ensuring anodizing or plating layer thickness compliance.
Our Finishing Process: Quality at Every Step
We follow a rigorous process to ensure your parts are finished to the highest standards of quality and consistency.
We work with you to choose the perfect finish based on your functional and aesthetic requirements.
Parts are meticulously cleaned, degreased, and masked to ensure optimal adhesion and a flawless result.
Your chosen finish is applied using state-of-the-art equipment and techniques by our experienced technicians.
Every part is inspected for color consistency, thickness, adhesion, and overall appearance before shipping.
Why Surface Finishing Matters for Your Product
For SMEs and brand owners, the finish is what defines the perceived value of your product. Without in-house factories, you rely on a partner who understands cosmetic criteria, material science, and DFM (Design for Manufacturing).
We don’t just remove tool marks; we enhance durability, corrosion resistance, and aesthetic appeal according to your assembly requirements, using state-of-the-art inspection hardware like CMM and optical projectors to guarantee consistency.
Ready to Add the Perfect Finish?
Our team is ready to help you select and apply the ideal finish for your project. Contact us today to discuss your requirements and get a free quote.