I think the most repeatable method is 500-XXXX-Powerhouse Factory Finish Polish. Change XXXX to 800, 1000, 1500, 2000, etc. to suit your game.
As far as Storm Step 1, 2, 3, I have used them. They are "sanding agents with polish" according to Storm. Storm describes the products as Step 1 having the highest ratio of sanding agent to polish, Step 3 the smallest ratio. [This could get an entire discussion going, I know, are they dual-grit? How does Storm define "polish" exactly.]
I have had great success with Steps 1, 2 and 3, but I think the method I stated at the beginning is just plain more repeatable.