Magnesium gives up its electrons faster than a new foiler pawning his 17m.
We use it in aviation a fair amount, more so on the older stuff. Salvaged a helicopter that had ditched and rolled in the ocean. Could stick your whole fist into the transmission through the side case.
I got some pitting on my NP alu fuse when I left the carbon wings attached overnight, mag would been markably worse.
But some alloys today are truly amazing. So who knows, you first. I thought north's Carbon reinforced polymer (plastic) foil construction was a good mfg direction for our application, but then it sounded like there were multiple issues.