Howdy, I am trying to paint a metal T shaped clothing rack from it's silver default to a color. It's for a store I manage and without getting into too much unnecessary detail, it's the perfect fit but needs to be a color instead of this metal. From the research I've done, it seems IDing the metal as ferrous or non-ferrous is very important since the chemicals are different in each type. It's magnetic, but I can't tell if it's actually ferrous or galvanized. I've attached some pics of the pieces. It's a custom build for a Forever 21 that went out of business in the area, if that's any help.
Additionally, the steps I've determined through all my searches averages out to these, but please let me know if anything seems deeply off:
Clean w/ acetone and \[shop\] rags
120 grit sandpaper (I've also seen ScotchBrite Red recommended but that's a very different grit so I think that's recommended for painted metal you're going over)