More like, he knows Celestial tech, and for whatever reason you want to think up, he's able to take control of it.
An example would be Hank Henshaw. Able to take control of any machinery pretty easily, even when weakened. Hacked the Source Wall. Put him up against, say, Deathlok, and he'd win.
Put him up against any machine based character, and based on his Source Wall hacking feat, and you'd have a pretty strong case.
Does that give him the autowin against Swamp Thing, Odin, Thor, beings who don't have machines? Hell no.
I didn't know the people he named walked around with Celestial armor on.
I see no reason why Magneto could not affect Apocalypse armor. It isn't near as advanced as a Celestial and the crazy thing about it is, he wasn't even at full power when he did it, and he did it effortlessly. If this is a full powered Magneto that Apocalypse is fighting, then...
Trust me, I am an Apocalypse fan but I am not going to ignore what Magneto has done because of my fanboyism either and the crazy thing about it is, it is in character for Magneto to rip that armor to shreds during the onset of the battle AND use it against Poccy.
The only way Apocalypse will ever win in a comic is if he stomps Magneto in the movie (Marvel have a way of bitching their characters to the movie audience), and even then, it's not a certainty.
If Fassneto ends up killing Apoc in the next X-Men, the character might as well play hide and seek anytime Magneto is in the same storyline, otherwise he'll be fisting his own ass for Eric's pleasure.
As of now, though, Magneto has left Apocalypse drooling or shattered in their major confrontations within the comics.
__________________
“Perhaps this is the ultimate freedom. The freedom to leave.”
I've been trying to recuse myself from this thread due to my own noted Apocalypse super-fandom, but I'd just like to point out that while Apocalypse does use Celestial armor, he also has full control of his atomic structure as well as the power to adapt to conditions on the fly, so I'm fairly certain, with the knowledge going into the match that Magneto controls magnetism and ferrous materials (since Apocalypse would have prior knowledge of Magneto), and this being a non-plot driven forum fight, Apocalypse is likely not going to just stand there remaining in metallic form or not shield himself against EMPs while fighting him, or resort only to melee attacks by morphing his arms into blades, maces, and whips. He could just as easily morph his arm into a non-metallic minigun shooting ceramic rounds, or use his telekinesis and soul/energy absorption powers and drain Magneto like he did Cyclops. Not saying he will in every match, but saying that Magneto is not the only character in this match with options.
That's all I'll say. I won't comment again in this thread.