Welcome to the forum.
About the wakizashi I cann't tell anything. I leave it to the other forummembers more knowledgeable on that field.
The mandau is from New Guinea. The most examples are made for those who travel, however, yours is different especially the paint. Not so bright and shiny. Looks like this is a good one and original.
We had some threads about the keris in this kind of dress. For example this one:
http://www.vikingsword.com/vb/showth...ghlight=guinea