Black oxide bolts for running boards

[M60A3 Driver]

About a week after I got my 2021 Ram Warlock in August last year I put running boards on it. Because it's a lease I didn't want to spend a lot on them. I need them for my father who is almost 86. When I put them on the bolts were shiny and could be seen easily. I was going to paint them to match the truck but I never got around to it. Long story short, the bolts have rusted in less than a year and looked like crap.
I decided to replace them with black oxide coated bolts. What a difference! They don't attract attention and they look great! I just hope they don't rust! LOL
Below are a couple of before and after pics.

 

[M60A3 Driver]

Update on the Black Oxide bolts. I ended up going with Stainless Bolts and painting them black. They're more expensive but are the best choice.

 

[MartyZ]

Black Oxide by itself without some sort of clearcoat or paint on them will absolutely rust.
I would argue that it rusts faster than bare steel, but that's just my opinion.
We use Black Oxide in the Automotive robotic industry and they don't tolerate water at all, small spills will cause surface rust on the bolts.