Pictures are kinda difficult to judge but it looks like you could get more from it.
On ebonite I wet sand from 320, 400, 600, 800 and wet sand using M.mesh pads..then I use Dr. KIRKS Scratch remover..followed by Meguiers Plastx car polish. I still dont think its great after this but it's presentable.
Last night I used "TonyL's" file in the IAP library and put together a 3 wheel buffing system using one of my lathes..though I honestly think it dulled what finish I had, but I am using cheapo ryobi buffing wheels so I need to look more into better wheels.
Anyways, I think to get a better shine it's going to require buffing wheels..I just need to buy the ones Tony recommends.
Look at my last couple of posts in " show off your pens", this is using everything above except the buffing setup.