Windshield - cleaning before installation

Depends on what's on the metal.
If it's just old dirt and crap then a toothbrush works good.
If it's old window glue then a rag and some solvent (I'm sure I don't have to warn about solvent strength, but mineral spirits is pretty mild stuff.)

I got some seals and side windows parts from this place, and the quality is fantastic.
http://www.justmopar.com/store.php