Protocase Resources

The information below is intended to be helpful for customers who wish to learn more about enclosure design. Also, please use our online support if you have questions for our expert design staff.


Frequently Asked Questions


What standard powdercoat colors do you offer?

We stock a variety of colors, in a variety of textures. We also can supply non-standard colors but this will add to the manufacturing lead time and/or cost. See our powdercoat page for more information, including a list of stock colors.

What if I don’t want to powdercoat my design?

We offer two different bare metal finishes: “no finish” and “grained finish.”

What is the difference between “no finish” and “grained finish”?

No finish means a part is deburred only – there is no additional finish or sanding applied to the metal. Minor scratches and blemishes are to be expected, with a consistent finish on both sides. With grained finish, a part is deburred and scratched using a brush/sander to create a uniform grain direction on both sides. Grained finish is an ideal application for when powdercoat is not desired, but a uniform bare finish is still required.

Do you offer chemical conversion coating?

Yes, we offer in-house chemical conversion coating for aluminum. Otherwise known as chem film or chromate coating, this coating process applies chromate to the metal substrate, creating a surface that is corrosion resistant, durable, and exhibits stable electrical conductivity. (We also can provide a quote yellow chromate coating, which is not performed in-house). Learn more about Protocase’s Chemical Conversion Coating.

Is it possible to oxidize the surface of my sheet metal design with color dyes?

Anodizing is an electrochemical process that converts the metal surface (aluminum, typically) into a decorative, durable, corrosion-resistant, anodic oxide finish. Although anodizing is a finish we offer, it is performed externally by a third party. As a result, our standard lead time does not apply (turnaround times are typically 1-2 weeks) and will associate a minimum lot charge.