Moshah,
Detlef is fine, sajen is my user name.
I don't know if you have seen this thread:
http://www.vikingsword.com/vb/showthread.php?t=8761
Ok, it's a Sumatra keris (like I believe that's your's blade also) and I think that your blade have a very nice pamor and it don't will look nice like this without warangan. I don't know if Bugis blades have had originally a warangan but BluErf for example have a great knowledge about this and will be able to answer this question. I personally like it by keris from all region when they etched. Like you see in the link above the pamor is better visible.
The pamor on your keris seems to be some sort of Wengkon Untu Walang, but I am not very sure and I am not an expert.
Like I write before, it's a very nice keris in a good state and I would be happy when it belongs to my collection!
Regards,
Detlef