I have a 7 tier paint drying rack on nice casters. The tiers take 1" EMT.
I built it when painting our cabinet doors so I could have many doors drying at one time. It works great and doesn't take up much space when not in use because the EMT shelves slide out to be stored vertically.
I have 4 shelves in it in the pictures but you can add EMT for 3 additional shelves. The EMT is 23" apart so if your painting smaller pieces you just add some thin wood strips across it.
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