MAKE US YOUR SOURCE FOR METAL PREP & FINISHING, POWDER COATING, NONDESTRUCTIVE TESTING & MORE.

At Sub Source, Inc., we deliver responsive, full-service metal finishing, coating, and nondestructive testing — all from a single, centralized location. Based in Rockford, Illinois, our 120,000-square-foot facility houses advanced lines for metal preparation, finishing, and coating, along with two fully equipped NDT labs — offering unmatched efficiency, capability, and control.

Whether you're in agriculture, automotive, aerospace, or defense, Sub Source is your trusted single-source solution for both critical and secondary processes. From high-volume runs to complex, custom components, we handle it all with precision, speed, and technical excellence.

Industry-Leading Coating Services

We provide a comprehensive range of industrial coating solutions, including:

• ✅ Liquid paint coatings tailored for performance and durability

• ✅ High-performance specialty coatings for corrosion, solvent, and chemical resistance

• ✅ Custom powder coating solutions — Rockford’s trusted experts in durable, precision-applied finishes

Our in-house powder coating specialists will work with you to achieve the exact characteristics your part demands — from color and gloss to hardness, flexibility, corrosion protection, and environmental resistance.

NADCAP Accredited & ISO Certified Processes

Sub Source is proud to be both NADCAP accredited and ISO certified, ensuring quality, consistency, and compliance across every service we offer. Our nondestructive testing labs (NDT) support ultrasonic, magnetic particle, and other inspections to verify part integrity without compromise.

Why Choose Sub Source?

• 🧠 Over 50 Years of Technical Expertise
  Solving complex part and process challenges with proven, innovative solutions.

• 🏢 All Services Under One Roof
  Metal prep, coating, finishing, and NDT — no outsourcing, no delays.

• 📦 Pick Up & Delivery Available
  Streamlined scheduling and delivery for shorter lead times.

• 📈 94.7%+ On-Time Delivery Rate
  Reliable performance you can trust — project after project.

Ready for a Metal Finishing Partner That Delivers?

Sub Source offers the scale, certifications, and customer-first service to carry your most demanding project from start to finish. Contact our team today to discuss your specific coating, finishing, or testing needs — and experience a smarter, more efficient way to complete your metal parts.