I think it looks fine, but IMHO aluminium is nice and light in the hand.
I also have a mini lathe, but have not made a complete knife myself yet. Having small hands, and the start of arthritis in a couple of fingers, I experimented with turning a wider barrel, then refitting the finger crescent bit.
Mine is made of aluminium, and I think the knurling came out not too bad for an amateur. How did you put together the swivel part, I’ve not quite worked out the design for my next complete knife.
Excuse my tappy hammer.