Barong restoration suggestion...

[Spunjer]

i have a barong that, well, looks great. the only thing that's distracting the over all picture is the part where the handle connects to blade. it's not ovbious if i intend to just display it on the wall, but i'd really like to care of this wonderful piece, and that includes making sure everything is in tiptop shape.

the blade is still securely attached to the handle; there is no play at all. the only thing is, it look rotted where it meets. also, i'm worried that moisture might get in and further weakens the connection. my questions are:

a) how do i prevent it from rotting even further, and
b) how do restore this gap?

can i fill it up with some type of clay or is there anything i can buy over the 'net to remedy this problem? please note that my woodworking skills is between negative one and zero. it goes up to one when it's life threatening.

battara, i would love to ask for your service on this but i understand that you're very busy at the moment, and also, i figure sooner or later, i will have to learn this kinda stuff