Brass black metal finish for tubes

A nice touch for acrylic blanks is to use a colored tube so the brass doesnt show through. I was helping my granddaughter make a pretty pen and we swapped the tube for a powder coated white tube. This leaves a perfectly good brass tube with nowhere to go and I got to thinking of a good way to

Mixing Metals at Home: The Do's and The Don'ts to Know

4 Column Single Rail – Matte Black & Brass

Rectangular Tube, Rectangular Metal Tubing

Brigitte Chandelier by Mitzi

Is Brass Out? How to Mix Metals like a Pro - Colour Trends

Brass Toe Kick Corner Angle- (Matte Gold Finish)

All About Kingston's Colors & Finishes

Blackened Steel Finishes for Decorative Metals - Wiemann Metalcraft

KYRID 64.5” Adjustable Metal Floor Lamp with White Drum Shade Modern Matte Black Floor Lamp with Antique Brass Adjustable Tube

Brass Black™Touch-Up, 32 fl. oz. Bottle - Birchwood Casey