Bill, welcome to the forum. I never, ever take a luger completely apart, but many members feel compelled to do so
Even if it had not been reblued, many folks will say a restraw will not hurt the value. Other, purist types would say leave it alone. Many times the russian 'dip' will come off.
Pictures are a must, afterall you brought it up?
I would think that if you want to restraw, go ahead and do so, there is some guidance here on proper color / time etc.
Ed