metal weapons and tools in the pacific

[Clubs & Arrows]

Hello Ausjulius,
The Samoans had the Nifo Oti which was a long rectangular blade with a small hook curling away from the top edge. You can find it in:
Early Photography - Tonga and Samoa 1855 - 1900 by Kurt During, and in the book Samoan Art and Artists by Sean Mallon. The Samoans fought with these during the civil wars during the mid to late 19th century.
Now, the same type of piece has the blade set on fire and is danced with at Polynesian themed events.

As far as Papuan blades, I'm afraid that I can't help.

Best regards,
Joe