Hum....hard to tell... did you let the brown dry and turn black before stopping the wheel? If so how long and how fast did you go?...were you using correct RPM and what wheel with brown? Were you using a cut ot color motion?
I'd do Spiral Sewn wheel with brown in a color motion and a loose cotton with the white also color motions.
You may have had speed to fast on brown and two slow on white!
I know, I know everyone hate's to do the Math but you must DO the calculations...
..."For best results your wheel should maintain a surface speed of between 3600 & 7500 Surface Feet Per Minute. (SFPM). The higher your speed, the better and quicker your results.
Formula for calculating surface speed of wheel in SFPM.
SFPM = 1/4 x diameter of Wheel x RPM (revs of spindle per min.)
Therefore an 8” wheel @ 3600 RPM =2 x 3600 = 7200SFPM. Spindle speeds can be increased by a step pulley on a motor shaft...."
OK so test and polish, brown should shine the surface! the white should make it POP! no haze, no fog no nothing...if you don't say WOW your not done!
Good luck...
Erck