Remove the lacquer with acetone. Be careful. Nothing hurts worse than cutting yourself with an acetone soaked rag. I know from experience.
I still have the knife though, despite its handle... It is my beater-knife that I use when all others are too "special"...
Looks familiar. I'm not 100% sold on the banksia material after seeing it in person, but you did a very nice job with it.
Actually I may not be so sure...
http://www.utihamono.com/houcho/nakirik.html does look very similar and the price is not far off, but it might
See the price here. It's called 'Drifting Cloud"