Metal Finishing & Coating

Powder coating, metal preparation and nondestructive testing in Rockford, Illinois.

Metal processing services in Rockford, Illinois

Coordinate preparation, coating and inspection

Sub Source, Inc. brings metal preparation, finishing, coating, and nondestructive testing together at our Rockford, Illinois facility. We support manufacturers in aerospace, agriculture, automotive, defense, and other industrial sectors.

Whether you need a single process or a sequence of services, share your drawings, specifications, quantities, and delivery requirements. Our team can review the work and help coordinate the required processing.

Coating options for your parts

Explore powder coating, liquid painting, dry film lubricants, CARC, and other metal coating services. Specify the required coating system, color, finish, masking, and operating environment so the process can be reviewed for your application.

Metal preparation and finishing

Our metal finishing services include zinc and phosphate processes, black oxide, passivation, chem film, and cleaning. Grit blasting and other preparation services can be coordinated with the finishing requirements for your parts.

Nondestructive testing

Our NDT labs provide magnetic particle and liquid penetrant inspection. Send the required method, specification, acceptance criteria, and reporting requirements. Review customer approvals and accreditation scope for the specific work being ordered.

Plan your next project

Use the quote request form to share drawings, material details, part dimensions, quantity, and requested timing. If you need help identifying the information to provide, contact our team at 815-968-7800. Ask about pickup and delivery when discussing your order.

Industry Sectors

Just click to download our current
Line Card in PDF format and see all
of our capabilities at a glance!

NDT Test Lab

Rely on our NADCAP-accredited Magnetic Particle Inspection (MPI) and Liquid Penetrant Examination (PT) to detect surface cracks, flaws, or other defects in your critical aerospace and other parts.

View Nondestructive Testing

Metal Coating

We're powder coating specialists. We also offer dry film lubricants, CARC and military spec paint, alkyd, epoxy & polyurethane paint.

View Metal Coating

Metal Prep & Finishing

Our metal prep and finishing services include fine- and heavy-grain zinc, manganese & iron phosphate, black oxide & more.

View Metal Prep & Finishing

Our Customers Trust Us

Jeff Swanson
Advanced Machine & Engineering Co.

Sub Source is a key component to our success. They continually thrive in the areas of quality, cost, on-time delivery and have an excellent customer service team that meet the ongoing demands of our business. They are a great supplier and will be for years to come. 

Kevin Kretsinger
Rockford Spring Company

Sub Source always comes through for our finishing needs. They go above and beyond to meet our requirements.

one-stop source

Let our dedicated team of experts coordinate all of your critical and secondary process needs. With our NADCAP accreditation and ISO certification, you can trust us to complete your project with the highest quality standards.

ISO-NADCAP