01
Finish purpose and system
Separate corrosion, chemical, electrical, wear and cosmetic intent, then invoke the selected process specification and class.
Evidence route
Functional requirement, finish callout and applicable standard
Sheet-metal finish control
Sheet-metal coatings: specify the complete system and inspect the final interfaces.
Powder coating, wet paint, plating, conversion treatment and passivation affect protection, appearance, threads, fit and electrical contact differently. PartVerity closes pretreatment, hanging, masking, build, colour and final verification before the finish is released.
Decision premise
Coating question: what must the finish do, where must it be present or absent, and which final features prove function?
Engineering control
Six controls from pretreatment to final release
A colour name is not a coating specification. Base material, environment, preparation, process class and acceptance evidence form one system.
02
Pretreatment and cleanliness
Define substrate preparation and compatibility because adhesion and corrosion performance begin before colour is applied.
Evidence route
Approved process route and provider declaration/test scope
03
Hanging and contact points
Plan rack holes, hooks, clips or temporary tabs and identify acceptable contact marks away from critical surfaces.
Evidence route
Hanging plan and visual-zone compatibility
04
Masking and hardware sequence
Mark threads, bores, datums, earth contacts, sealing faces and self-clinching interfaces that need exclusion or post-finish installation.
Evidence route
Masking drawing and controlled operation order
05
Colour, texture and build
Specify exact colour system, supplier/product where needed, gloss/texture and supplier-declared thickness range instead of a generic colour word.
Evidence route
Physical sample/reference, batch record and thickness result where specified
06
Final functional release
Verify adhesion or other specified finish tests plus thread, fit, grounding, sealing and dimensional CTQs after the complete process.
Evidence route
Final test/inspection record, NCR status and release authority
Decision matrix
Coating condition to control response
Coating thickness figures and performance depend on the selected system and provider; PartVerity publishes no universal buildup guarantee.
| Coating condition | Control response | Final evidence |
|---|---|---|
| Tight hole or sliding fit | Mask, allow, or post-process by approved route | Final gauge/dimensional result |
| Functional thread | Mask, protect or install hardware after coating | Thread gauge or assembly check |
| Corrosive environment | Substrate/pretreatment/coating system review | Specified process and test/certificate scope |
| Brand-critical colour | Exact product plus approved physical sample | Batch identity and controlled visual inspection |
| Electrical contact or grounding | Defined exclusion/masking zone | Continuity/contact and coating-boundary check |
Claim boundaries
Coating statements that are not release criteria
‘Powder coat black’ without product, texture, gloss or sample basis.
Checking critical fits only before coating.
Assuming installed hardware remains compatible with every finishing bath or cure cycle.
Treating visual coverage as proof of adhesion or corrosion performance.
Technical context
Use guidance to frame the review—not to replace project evidence.
External context for hanging, buildup, colour, pretreatment, threads, masking and hardware sequence. Values and capabilities are provider-specific and require project confirmation.
Approved Sheet Metal powder-coating guidance