I just installed red and white oak in my entire house and stained it dark walnut. It looks pretty good but there are a few areas that need some touch up and I could use some advise on how to do it. There is one area in the middle of the hallway that came out to dark and there is an obvious transition in the middle of the room. How can I blend these to areas so the transition is not so obvious? In the room with the herringbone pattern, I wiped it all one direction so it obviously was not going with the grain and it is noticeable. How do I get these light streaks out? Thanks for all you professional input/help.