Bugis keris unusual blade/help wanted

[asomotif]

Dear All,

I bought this keris in Bugis dress.
The blade seems to be Ganja Iras on first sight and seems to be single steel/iron.
But the ganja shows some forging lines that indicates it is a separate ganja.

Further, what origin would this blade be ?
Any suggestions for cleaning etching the blade ?

Thanks and best regards,
Willem

Ps. I took the pictures with my girlfriends expensive 'Canon' camera and put them on a memory stick. Much better than my old 'trust' camera.