Guess what? Yup, next up is 1000 Grit paper.
Same steps as B4.
You will almost feel at this point that you are doing nothing but wiping over the surface. But as you clean off the water and inspect it, you will indeed notice there a fresh shine to the surface. This is due to the lack of grooving that is there. More surface area equals more reflection. And by now you have an almost smooth-as-silk surface.
After 1000 Grit Sanding:
I did have to go back over some detail areas after this pic. But its a very shiny surface now.
I actually made this my last step. You may want to go to 1500 Grit if you are out for that chrome-mirrored look. I was content with the way this was going to turn out after polish and buffing.
Now you may think that is you can get that amount of shine from sanding, why buff and polish?
Heres a shot comparing the 1000 Grit sanded surface to the buffing done with Emery Compound.