I usually do 1200->1500->2000->3000 trizact. We used to presta products, but we found that swirl marks would appear a few days after the buff was done, so we switched to 3M water based products. Unfortunately my boss is allergic to something in the 3M so we've swtiched to Menzerna products. I still use presta's ultra cutting creme w/ 3M white wool for the initial buff, then I use Menzerna Super Intensive Polish w/Menzerna Yellow foam ->Final Polish w/ Menzerna Black foam.
This is the usual result: