I tried those sticks on another white metal.Effect are great as always.Share with you.
step 1 choose an original part.Notice the mold lines and huge grains on the part
step 2 after purple (extra coarse)polishing stick (mold lines were removed mostly,but grains were still big)
step 3 after grey (Fine)polishing stick (deep and fine polishing,grains were smooth now)
step 4.5 ,4 after green side and white side of the polishing stick(after green side,the shine was a bit blurry.after the white side,the shine turned to be real metal shine!)