Aluminum parts are used in equipment, enclosures, frames, housings, and many other manufactured products. When a component needs a protective or decorative finish, the coating plan should account for the actual part—not just the color or coating name on a purchase order. Alloy, part condition, service environment, and production requirements can all affect how a coating project should be reviewed.
Before production begins, manufacturers should share the available part and finish information with their coating partner. Early discussion can help identify questions about preparation, masking, appearance, and how the finished component will be used.
Identify the Aluminum and Its Current Condition
“Aluminum” can refer to different alloys, forms, and manufacturing conditions. A part may be cast, machined, extruded, formed, or fabricated, and it may arrive with oil, residue, an existing finish, or other surface conditions. These details can affect which preparation and coating approach is appropriate.
Include the alloy or material designation when it is available, along with information about fabrication, prior treatments, and any existing coating. If the material is uncertain, say so instead of assuming that all aluminum parts will behave alike. ASTM’s standard practices for preparing aluminum and aluminum-alloy surfaces for painting provide background on why the substrate and its preparation matter.
Define the Required Finish and Performance
Manufacturers should identify more than a color. Share the required coating system or specification, color reference, gloss or appearance expectations, and any applicable performance requirements. Explain whether the part will be exposed to moisture, chemicals, sunlight, temperature changes, abrasion, or frequent handling. These conditions help frame a useful review of the finish requirements.
The Aluminum Association’s designation system for aluminum finishes describes ways to identify different finish categories. For project planning, New Finish’s guide to how the service environment shapes industrial coating selection offers additional context on matching a coating discussion to the conditions a part will face.
Discuss Surface Preparation and Masking
Surface preparation is an important part of a coating plan. Aluminum can respond differently from other metals to cleaning and pretreatment choices, so manufacturers should provide the available material and specification details and confirm the applicable requirements with the coating team. The Powder Coating Institute’s powder coating FAQ notes that aluminum can react to some strong acids or alkalis, one reason preparation should be considered for the substrate and system involved.
Also mark surfaces that must remain uncoated or meet special requirements. These may include threads, mating surfaces, electrical contact points, grounding locations, or areas that affect fit. Clear drawings and masking instructions help the coating partner review those details before the parts enter production. See New Finish’s overview of surface preparation for coating for more background.
Share Drawings, Volumes, and Timing
Provide current drawings, part quantities, expected order frequency, packaging or handling instructions, and target dates. If the project includes a new design or a change to an existing part, identify what has changed. These details help the coating team understand the scope and raise questions before production is scheduled.
For additional planning guidance, read what manufacturers should include in industrial coating specifications. Clear documentation gives the coating partner a better basis for reviewing the requested finish and production needs.
Review the Project Before the First Production Run
Before releasing a full order, confirm that the material, preparation, coating requirements, masking details, appearance criteria, and inspection expectations are understood. A discussion before production can help resolve open questions and set a clear basis for the work.
New Finish, Inc. works with manufacturers on commercial coating projects. If you are planning a project involving aluminum components, contact New Finish, Inc. to discuss the part details, finish requirements, and production needs.