Lightly scour the PVC pipe’s exterior by hand with 220-grit ... you’ll need to apply several coats in thin layers until the “true color” is reached. Step 7: Let the PVC dry for 24 hours.

Consider spray painting the PVC pipes black and staining the wooden shelves with a dark wood stain for an industrial vibe, or paint each tier a different color for a vibrant color-blocking effect.