Digital BW, The Print

Having had some fun (not!) totally ruining some sprayed prints on Epson semigloss by 
rubbing Renaissance Wax on them - I am using a colour MIS CFS (CFS-2200-UC) but with 
Eboni in the K position and QTR - I took a look through my saved group messages and 
reread some of those pertaining to blackless printing.  As a result I have a couple of 
questions.  Why is it the Eboni ink that is causing all the bronzing issues on RC paper and 
not the other UT7 inks as well?  I thought the various shades in the UT7 inks were in 
essence diluted K.  If the problem is Eboni then why can't the attributes in the other ink 
slots that prevent bronzing be introduced in an Eboni replacement?    I am reluctant to 
switch to UT7 because I would like to keep using my 2100 for both colour and B&W 
printing.

BTW re the Renaissance Wax (which I was trying because of the bronzing issue), while the 
post-sprayed pre-waxed prints seemed quite stable to the touch the wax seemed to cause 
the very dark areas of the print to smudge.  Perhaps I was a little over zealous with the 
wax but I doubt it could be buffed without this occurring.  Also I found it difficult to get a 
nice finish on the wax on the print (even ignoring the smudging).  Any tips would be 
appreciated.

Cheers

Steve