About time for an updated list!  The first Armor Kink list is here.  Here are some other suggestions for you:

RUN PROGRAM: COMMENTS AND KUDOS FOR YOUR AUTHORS!

Automated Fucking (series) by IOnlyWriteWhenCarmelyzed: Steve gets bent over by one of Tony’s Iron Man suits

Knot Me Not by Bill_Longbow:  When their omega is away on a black-out mission, alpha Steve and alpha Tony resort to using the armour as a very fancy fleshlight when Steve goes into rut. (background Stuckony but fic features only Steve and Tony)

Not what we have, but what we enjoy, constitutes our abundance by @blossomsinthemist: Sometime after getting together after the events of Dark Reign and Siege and Steve’s return from the dead, Steve and Tony plan out a more elaborate intimate encounter, one that involves the Bleeding Edge armor and a good deal of spare time.

Seven Minutes in Heaven by @msermesth: Peter Quill has had it up to here with Steve and Tony’s endless bickering, and he decides to do something about it.

Edges by @dirigibleplumbing: Steve has some ideas about what Tony’s neurally-controlled nanotech armor could be used for. Ideas involving bondage, Steve losing his virginity, and, hopefully, he and Tony working out some of their issues.

Pinned by CircleUp: Tony comes back from a business trip to find Steve using his armor in an off-label way.

Filled by @ashes0909: On cue, Steve heard the penthouse elevator doors open, the familiar whirring sounds of metal plates as they moved.

what you like times two by @gottalovev: To Tony’s delight, Steve Rogers is a lot kinkier than the WWII newsreels had led him to believe.

Art Deco by @royal-chandler: The voice in the back of his head shouts at Steve to respect Tony’s privacy, but the other man is so wildly beautiful and wanton that the diamond-bright desire under Steve’s skin–the torch he’s been carrying for what feels like always–burns hotter than shame. (Steve watches the armor and Tony)

Para-Docks and Pier Pressure by @kandisheek-art: When Steve imagined Tony and the armor double teaming him this wasn’t quite what he had in mind. But – as always – Tony manages to make it good for him anyway.

Masks by @kandisheek-art: Tony knows the suit is sexy. He just didn’t think Steve would agree so enthusiastically.

In Every Way That Matters by @sineala: There are bright things about the future, and Steve’s friendship with Iron Man is one of the brightest. So what if he doesn’t know who the man under the mask is? That’s not going to stop Steve from wanting his friendship, or even from wanting something more. (not super explicit, but such a good fic)

Form Follows Function by @polizwrites: Steve’s appreciation for the technological wonder that is the Iron Man armor turns kinky.

Remote Possibilities by @jellybeanforest-a-go-go:  Steve Rogers has always had a thing for Iron Man. He’s so sleek, so powerful, and incredibly sexy. His boyfriend, Tony Stark, indulges him.

Put on the Suit, Give Me a Show by MiniRaven: Steve tells Tony to put on the suit. Tony happily obliges.