mid 19c Tulwar?, please I would like some advice?

[katana]

Originally Posted by Jens Nordlunde

The blue bugs me a bit, as they did not enamel on iron,

It is a nice tulwar with an interesting hilt; notice the way the quillons end. If the blade has a false edge on one third, the false edge would be about thirty cm, which would be quite a lot.

I'm beginning to think that the blue is some sort of paint rather than enamel....and that it is not original to the sword. I was thinking of using a pin...heated up and placed on the edge of the 'blue' ....if it burns..it must be paint? If it is paint I feel I should remove it.....should I?
The false edge is 23cms from the tip to where the back tapers and is still relatively sharp...with no evidence of it being sharpened for a very long time.