@Sledgehammer427
You can flip faces on obj files with nothing more then Notepad.

It is a hardcore approach,
and takes a bit of trial and error to figure out.
But here's a how to link that explains somethings..
http://www.royriggs.com/obj.html
I do ALOT of obj file work with nothing more then Notepad.
At times?
Editing the obj before 3D work stops flipped faces problems.