Hoagland's take on the subject:
http://www.enterprisemission.com/Phobos.html
Hoaxland’s not a scientist, and his take is irrelevant, and is definitely not science.
Phobos isn’t “obviously metallic”, it appears shiny here and there at certain angles; from Mars-side it’s obviously rocky. The close-up studies of it lead to the conclusion that it isn’t primarily metal, at all.