I used powder coating (electrostatic) back in 90.
Worked out Great for me.
The steel box was epoxy painted, the stuff chipped and let the box rust.
The paint was not conductive, had problems with EMC. (Noisy RF signals)

The powder coating looked like shiny metal, was conductive!
Did NOT chip, was great. Couple choices in finishes. I liked shiny.
Back then the cost was couple times the cost of the epoxy paint.
Was well worth it for my application.
Had coated 600 boxes 10" x 10" x 2" inside and outside.
I tried to get the boxes made with stainless steel, cheaper than steel + coating.
Vendor charged a lot for machining the SS box, excessive tool damage.
After the first batch, would not do any more.

Basically like painting, clean and prep surface then spray. But then you have to bake it. That gets hot but I forget the temp off hand. You can use a normal electric house stove oven for this. The powder dust is like grain (think food grains) and can explode like grain dust. Not a big problem, you just don't want to spray next to an open fire or use a gas oven with flames for baking parts.

I think the temps are way too hot for Neos as I recall. Although you could do all the metal parts.

For alot of uses powder coat is far better than paint, but the powders still cost more than paint. You also have the cost of baking it, electric oven or heat lighting. They do make portable heat lamp units for baking outside an oven, like for large parts.

If you had a large enough electric stove oven (or build your own) the cost to powder coat parts is not too bad really if you have enough use to buy the $50-$75 spray unit.

Having work done is like anything else though, it costs alot more than doing it yourself normally.
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nothing to lose