I would round out the handle a bit more, rather than having the finger grips like that. Take a look at the pics I've attached for some shots to see what I mean.
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Obviously, just from those three shots, you can tell that the handle on the prop changed many times. But it's always been more of an overall curve than a handle with finger grips.
For actual finishing in terms of painting, the blade should definitely be nice and shiny. I found a chrome paint from Lowe's that's their own Valspar brand that is shinier than the other two chrome paints I'd tested and also was able to be handled without taking fingerprints. Just let it dry for a long time after the final coat. I let it sit for a full 24 hours and still got a little bit texturing from the cloth I'd wrapped the item in where it got some pressure applied to it. It's fine now though (and was able to be handled without marring sooner than 24 hours, it was just where the pressure was.
The painting on the handle I'm less helpful on. I just recently sculpted and painted one, but I'm not 100% on the paint job. What I did though was lay down a base of the off-white color and sealed it. Then I used a foam brush to streak on the brown, which I didn't use a single color, I had different browns, some yellow, and some black on a piece of plastic that I would swirl and mix as I went to keep a natural color variance. Then I very lightly rubbed up the length of the handle in few places to show more of the base color. It's passable, but if I had it to do over, I'd change it up a little. Unfortunately I was under a time crunch and it was kind of do or die.
I'll try to upload a pic of the handle I just finished so you can see what I'm talking about a little more. Hope this helps!