Make it smooth

So after making it nice and shiny with the superglue that gets sanded down. Not real interesting to look at so there's no pictures so far. So far I've started with 150 and sanded so the only superglue left is what filled in the pores then went over everything with 220. Now is when we go with making it glassy smooth. I've read some people say 320 is plenty fine but I'll likely go on up to 1000.