Hello! First time-poster. Question about shoe shining. I understand needing different polishing brushes for different colored polish to avoid discoloration. My question is whether you need different brushes for different color shoes if you are using a neutral polish on both. Eg, I have a black pair and a burgundy pair, but I plan on using neutral on both. Do I need separate brushes? I guess the question comes down to whether a brush can "lift" color off the leather itself. Probably a little paranoid but I want to be cautious with a new pair. Thanks!