Found the citation for using Solaroid Blood for a crafting ingredient:
Oadenol's Codex, page 27, Vigorous Blood
So bleeding some demons is perfectly legit, though exalted would be hard
Oadenol's Codex, page 27, Vigorous Blood
Vigorous Blood:Blood from any mighty being
carries power that might be transferred into an artifact.
Gods and demons must offer their benefaction (above),
but elementals, God-Blooded and a myriad of other
creatures with magic in their veins may offer blood
to aid an artifact's completion. The creature's Essence
must be at least two dots greater than the artifact's
intended rating. Exalted must have an Essence three
dots greater, and they may not spend their own blood
to power an artifact they create. Entities of such power
often do not think highly of requests for a pint or two
of their blood. Blood is an excellent ingredient to tie
an artifact to an individual, and even the most skillful
artifi cers may be unable to avoid giving an artifact some
connection to the donor
So bleeding some demons is perfectly legit, though exalted would be hard