I would leave the blueing as is, I don't like new bluing on old guns, except in special cases (rust etc). The present scope is fine - if a bit on the large side -, I would live it as is. A possible second scope could be a little Leupold 1-4x or similar, maybe a 2-8x32, but I would never put an even bigger scope on such a handy BF. But this is only me, we all have different ideas of course.
Cheers,
Jani