I will be arriving from a non-Schengen origin and connecting to a non-Schengen destination, both arriving and departing at T1. I'll have a 3 hour layover so will I be able to stay airside and take the SkyTrain to use the Primeclass lounge in T2 and then come back to T1 for my 2nd flight? If not, then I might as well use the Luxx T1 lounge because it is landside. I just want to avoid the hassle of immigration and security just to visit a lounge, especially while coming back in for the 2nd flight (and Luxx isn't that great anyways).

BTW, is the T2 SkyLounge Schengen or non-Schengen? The PP website doesn't say.