Once placed, a portable skilling station can be used by any other player freely. This has led to players grouping up in Friends Chats to track players 'hosting' portables. Ironmen cannot interact with any portable skilling stations. Portable skilling stations last 5 minutes once placed, but additional locations of the same type can be used on it (by any player, not just the original placer) to extend the duration by 5 minutes each, up to one hour.