Polishing

[dabears]

So i have polished both side rails and one side of my flatbed front plate, but i still keep getting little black smudges that dont really buff out, or if they do i get a hazy look... for the most part its pretty clode to mirror finish, i started with 150grit then did 220, 330, 400, 500 ,660, 1200, 1500, then 2000 wet sanding the last 3 grits im using the green, white and brown polish and a 2 sided grinding wheel setup, medium pad on one side and soft cloth pad on the other..... its getting to me cause i have seen some really good finishes but i can get close but not there. any help would be greatly appreciated!!
I even tried useing that "mothers" crap polish hazed it even more then had to run it thru the wheels again...