I'll offer a couple of pointers ; you don't sharpen an Indo-Malay 'keris' .
They are essentially for stabbing ; a 'bent elbow' weapon , having said that ; there are probably always exceptions in real hand to hand fighting .
If your new keris is rusting then it is most likely because you are not maintaining it properly .
Your old keris is thinner because of repeated washings in Warangan during Muharram ; if it is centuries old then a lot of the original material has been lost due to this process .
Below is an example of the results of a few hundred years of washing ; the parallel lines running down the blade are strands of the base iron .
A forum search using 'keris' will give you a LOT of information .
The search function can be found at the top right hand corner of the page .
We have a lot of keris enthusiasts here ; enjoy !
