I have experienced the same thing. A better quality tape helps but I still see a mix of tape and steel swarf. No big deal, just rinse off the hone once in awhile while honing. Yes, it happens more at the coarser grits and I do change tape usually after the 1K & 4K hones.
And ,NO!, I will not use different colors! Good grief, so when I use 3 layers of tape I should use Red, White & Blue!????:rant:
Thanks for the humor,:)