so i bought a used a14 i knew id be rebuilding. they told me it was pulled from a running car and had been in doors for the all the 4 years they had it. when i picked it up it looked ok just some surface rust but it had seized, so they sold it to me as a core and i went on my way. anyways i tool off the manifolds and the intake ports are filled with white and orange flakes; mostly white. is this aluminum oxide? is there anything i can do to prevent this from coming back?

also i havent taken the head off yet because ive got some marvel mystery oil soaking