Thanks for the input guys

my shop is really tiny and a total mess. Storage is one thing I'm very short on, so it won't be sacrificed to any kind of display cabinet. I don't have the covers, as they got transferred to the generator that this box extension came off of. I can make some aluminum ones easy enough tho. Trying to justify it as the best use of space vs. the space I need most.
I've always wanted a locker for coats and gear, but I think it's a bit shallow, and I know myself... It would only ever be 1/2 full yet a total mess and no way to find anything.
A horizontal cabinet on the wall would be nice, but again, organization always seems to leave that type of shelved cabinet with tons of wasted space. The box itself also does not lend itself to attaching shelves to the "ends" as they are just single layer bolted on.
Powder coat oven! I like that! Stopped me in my tracks. Need more research on guts for it. Do. I just strip out an old electric oven?
Flammables locker- easiest option, and I could fill it as soon as it had shelves
Drawers- I envision a mini Lista cabinet. I can build the drawers easily enough, and likely nearly for free. I'd have to buy slides. Hand tool storage truly is what I'm in need of the most, as my big chest is at work. I currently work out of an old 24" top box, a cheap carry tool box with three little drawers and three small wooden drawers. This would be the most involved project though, and I have no shortage of projects. Someday, I'd like to work in the shop instead of on the shop