Take the metro to the "Brudermühlstraße" and walk down the "Brudermühlstraße". You'll reach a bridge over the Isar where the bridge piers are legal to paint. Ask for permission at diefaerberei.de
Still up on their website diefaerberei.de/graffiti
This is not a legal wall. You need permisson from "Die Färberei", hosted by Astrid Weindl.
Is this wall still safe to paint?