Actually, since January 1st 2002 Finland is part of the Schengen countries ( along with Austria, Belgium, Denmark, France, Germany, Greece, Iceland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain and Sweden) so normally you should be clearing immigration at CDG
-jan

PS. Finnair uses the "Salon l'Espace" lounge located in Terminal 2 D, mezzanine floor, stairs opposite of check-in area 8.