I have a Peterson Ashford pipe. It seems to have a lot of white streaks on the briar. Maybe it might have been me when I got a bit of alcohol on the outside while cleaning, but I can't get it off. I have a Dunhill Pipe Cloth and it doesn't seem to help. I was going to get a briar polish to see if that would work. But I'm looking for ideas on what those streaks are and how to get them off.