Made myself a paint rack out of foam board + hot glue, very easy, probably took about an hour. Shelves are 3.5cm deep (size of my largest paint pot (Reaper Pros), and craft paint bottles), and 3cm tall per step. 5 support struts over 20inch length. 3 steps for 4 rows (counting the ground row). Looks great and it was free!
Fully populated. most of my metallic paint not here since they aren't used often.