Appearance / Color
Review whether the part needs a visible color, metallic appearance, matte direction or customer-facing finish.
Surface Finishing Selection
Surface Finishing Selection Guide for Custom Parts
Compare common surface finishing routes by material, appearance, functional requirements and downstream manufacturing needs.
Surface Finish Samples01-06
01Matte
02Painted
03Anodized
05Polished
06Coated
First-Pass Review
Start With Your Requirement
Surface finishing selection should begin with the requirement the finish is expected to support, then be confirmed against material, geometry and drawing notes.
Corrosion / Protection
Protective requirements may be considered during finish selection, but suitability depends on material and application context.
Wear / Surface Function
Functional surface needs should be reviewed before selecting a coating, plating or finishing route.
Electrical Function
Conductive or contact areas may require project review before a surface finish is selected.
Texture / Roughness
Texture direction, matte appearance and downstream finishing needs should be reviewed with the drawing.
Masking / Critical Areas
Areas that should remain untreated or controlled should be identified before finishing is planned.
Finish Families
Surface Finish Families
Use these finish families as buyer-facing starting points. Each route still requires project review before production planning.
Anodizing
Aluminum-focused surface treatment reviewed for appearance and functional requirements.
Direction: aluminum finish review
View ServicePowder Coating
Coated color finish commonly reviewed for metal OEM parts.
Direction: coated surface coverage
View ServicePlating
Metal surface layer reviewed when appearance or functional areas need attention.
Direction: metallic surface review
View ServiceSandblasting
Reviewed for matte texture, appearance control and surface preparation.
Direction: texture or prep route
View ServicePolishing
Reviewed when a smoother or more reflective surface direction is required.
Direction: smooth surface review
View ServicePainting
Reviewed for color, visible surface coverage and project-specific appearance.
Direction: painted appearance review
View ServiceQuick Compare
Quick Surface Finish Comparison
This table supports first-pass selection. It does not replace material, geometry or RFQ review.
| Finish | Material Focus | Main Review Goal | Typical Appearance | Key Review |
|---|---|---|---|---|
| Anodizing | Aluminum-focused | Appearance / functional requirements | Clear, black or project-specific direction | Alloy, pretreatment, masking |
| Powder Coating | Metal parts by project | Coated color finish | Coated surface | Coverage, masking, geometry |
| Plating | Metal parts by project | Metallic layer / functional areas | Metallic appearance | Base material, critical surfaces |
| Sandblasting | Metal parts by project | Matte texture / surface preparation | Uniform matte direction | Material, surface condition, downstream finish |
| Polishing | Metal parts by project | Smooth or reflective surface direction | Smoother metallic surface | Geometry, visible areas, target finish |
| Painting | Custom parts by project | Color / visible coverage | Project-specific painted appearance | Surface preparation, masking, color reference |
Material Route
Choose a Surface Finish by Material
Material is the first filter. Finish routes below are decision directions for RFQ review, not automatic compatibility guarantees.
Highlighted Highlighted routes indicate commonly reviewed first-pass directions, not guaranteed or universal finish choices.
Engineering Plastics
Project ReviewPainting by project
Appearance Direction
Choose by Surface Appearance
Appearance should be reviewed as a direction first, then confirmed against material, process limits and customer requirements.
Sandblasting
May include sandblasting or selected coating routes when a matte or textured direction is required.
Painting / Powder Coating
Commonly reviewed when color, coverage and visible surface appearance are important.
Plating / Anodizing
May include plating or aluminum-focused anodizing depending on material and requirement.
Polishing
Reviewed when smoother visible surfaces or a more reflective direction should be considered.
Critical Review
Critical Areas to Review Before Surface Finishing
Areas that should remain untreated or functionally controlled should be identified on the drawing or RFQ before finishing is selected.
Threads & Holes
Threaded holes, bores and fastener areas may need masking or dimensional review.
Mating Surfaces
Contact faces should be reviewed when finish coverage may affect assembly fit.
Sealing Areas
Sealing surfaces should be identified before finish selection or process routing.
Critical Dimensions
Critical tolerances should be reviewed because some finish routes may affect functional areas.
Electrical / Contact Areas
Conductive or contact surfaces may require protection or a different finish decision.
Cosmetic Surfaces
Visible areas and cosmetic boundaries should be called out clearly on drawings.
Decision Matrix
Surface Finishing Decision Matrix
Use the matrix as a first-pass buyer tool. Final suitability should be confirmed through drawing and RFQ review.
| Requirement | Anodizing | Powder Coating | Plating | Sandblasting | Polishing | Painting |
|---|---|---|---|---|---|---|
| Color / Appearance | Common | Common | Selected | Secondary | Selected | Common |
| Matte Texture | Selected | Project Review | - | Common | Secondary | Project Review |
| Surface Protection | Selected | Selected | Selected | Secondary | Project Review | Project Review |
| Electrical Function | Project Review | Project Review | Common | - | Project Review | Project Review |
| Smooth / Reflective Surface | Selected | - | Selected | Secondary | Common | - |
| Downstream Finishing | - | - | - | Common | Secondary | - |
Common - commonly reviewed routeSelected - may suit selected materials / requirementsSecondary - often supports another primary finish routeProject Review - requires project-specific confirmation- - not a typical first-pass route
FAQ
Surface Finish Selection FAQs
How do I choose a surface finish for a custom part?
Start with the material, appearance requirement, functional surfaces, operating environment and drawing notes. The selected route should be reviewed against the part geometry and RFQ requirements before production planning.
Which finishes are commonly reviewed for aluminum?
Aluminum projects commonly review anodizing, powder coating, painting, sandblasting and polishing depending on appearance, functional requirements and surface condition.
What is the difference between painting and powder coating?
Painting is commonly reviewed for controlled color, visible surface coverage and project-specific appearance. Powder coating is commonly reviewed as a coated color finish for metal parts. Final suitability depends on material, geometry, masking and project requirements.
When should sandblasting be reviewed?
Sandblasting may be reviewed when a matte texture, uniform surface direction or surface preparation step is relevant to the part. It should be confirmed against material, surface condition and any downstream finish.
Does surface finishing affect critical dimensions?
Some finishing routes may affect fits, threads, holes, sealing areas or other functional interfaces. Critical dimensions and protected areas should be identified on the drawing or RFQ before selecting a finish.
How should masking or untreated areas be specified?
Mark threads, holes, mating surfaces, sealing areas, electrical contact areas and cosmetic boundaries clearly on drawings or RFQ notes so the finishing route can be reviewed before production planning.
Can surface finish selection be reviewed before quotation?
Yes. Finish selection can be reviewed during RFQ preparation when the drawing, material, quantity, appearance requirement, functional requirement and critical areas are provided.
What information should I provide for surface finishing review?
Provide the drawing, material, quantity, appearance requirement, functional requirement, operating environment, critical areas and any reference samples or finish notes available for the project.
RFQ Review
Not Sure Which Surface Finish Fits Your Part?
Share your drawing and requirements so the surface finishing route can be reviewed before quotation and production planning.
DrawingMaterialAppearance RequirementFunctional RequirementEnvironmentCritical AreasQuantity