Liquid Painting and Corrosion Protection:
At Sierra Spray Painting Ltd., liquid painting is a controlled, repeatable production process built for aerospace and high-reliability hardware. We apply primers and topcoats for corrosion protection, chemical resistance, cosmetic finishes, functional coatings, and identification markings, while maintaining tight tolerances through disciplined masking, film build control, and cure management.
We support customer-specific programs and controlled process requirements, with full material traceability, lot control, and inspection records tied to each work order.
Precision Masking and Interface Protection:
Masking is treated as a process step, not a quick prep task. We protect threads, bores, datum surfaces, bearing fits, sealing lands, electrical interfaces, and grounding points using repeatable masking methods appropriate to the geometry and tolerance stack.
Primer and Topcoat Systems:
We run primer plus topcoat stacks, single-coat systems, and multi-color requirements where applicable. Coating selection is driven by customer specification, corrosion environment, and functional need (for example, wear areas, chemical exposure, UV, or cosmetic appearance).
Film builds tolerance awareness:
We control the application to achieve the required dry film thickness range while minimizing variation across complex geometry. When parts have critical fits or tooling interfaces, we treat paint thickness as a functional characteristic, not just a finish requirement.
Clean handling and contamination control:
Parts are handled and staged to reduce contamination risk and rework. We segregate work, tooling, and materials to reduce cross-contamination, overspray transfer, and mix-ups between programs.
Controlled application and cure management:
Liquid coating quality lives or dies on process control. Our controls focus on the variables that actually change outcomes:
Mix control: batch/lot traceability, mix ratios, induction and pot life tracking, and controlled staging of mixed material.
Viscosity control: measured and recorded to keep atomization and film build consistent across operators and shifts.
Application control: consistent gun setup practices, technique controls, and verification checks during production runs.
Cure control: cure schedules managed to meet customer requirements, with supporting records and calibrated equipment where required.
Inspection and Verification:
- Our inspection approach is built around functional conformity and customer requirements:
- Visual acceptance for coverage, uniformity, defects, edge build-up, and workmanship.|
- Thickness verification where required by specification or where fit is critical.
- Adhesion and performance checks when specified by the program.
- Work order traceability so each shipment ties back to material lots, process steps, cure records, and inspection results.
Quality System and Compliance (AS9100):
- Our liquid paint process is supported by an audited quality system and disciplined documentation practices. We operate under AS9100 with a production mindset that emphasizes repeatability, traceability, and controlled change.
Automation Roadmap:
We are actively moving toward automated liquid paint application for improved repeatability, throughput, and consistency. Our automation plan runs through 2027 and begins this year with our first robotic arm and collaborative robots (co-bots). Automation is being implemented with the same control philosophy as the rest of our process: validated parameters, documented revisions, and change control tied to customer requirements.
What that Means for Customers:
- more consistent film build across complex geometry
- better repeatability lot-to-lot
- stronger process data capture and reporting
- scalable capacity for higher demand without sacrificing quality