Kepf,
I assume by "bronzing" you mean a metallic tinge to black areas of a print. If so, no I haven't seen that as far as I can tell. I just printed out the C M Y K 4 color purge pattern with settings for Photo Paper Pro and the profile I made for the ip4500 and IS inks. The black bar looks clean. Also a B&W test print also looked clean - no bronze tinge to the dark and medium black tones of the print.
I have been using Profile Prism for several years now and have been happy with the profiles generated. I do the scanning with a Canon LiDE-60 scanner and CanoScan software. Kirkland Glossy paper seems to give a slight greenish tinge with many inks including Canon OEM inks. Profile Prism profiles have cleaned that up. I have not been as successful in profiling Matte papers, but that seems to be a common complaint from PP users. Profiles are usable, but the scans have many Xed out color blocks so I am not sure what the profile misses.
msmart,
As you can see from my above comments - I use Profile Prism to generate printer profiles.
As far as refilling with a different ink - I purge my cartridges before filling with a different ink. I only use Canon OEM cartridges. Bought a resetter. I use the top fill refill method. Remove the plastic ball and reseal the hole with a #8 flat head nylon screw. I both refill and purge through that top hole. Some say that my forward flow purge method causes a buildup of old ink particles in the outlet sponge area, but I don't think that is so. The water pressure forces old ink out. Blow out the excess water with compressed air and let the sponge dry.
Even though IS and Canon inks are similar in tone/gamut I wouldn't try mixing the ink sets if the project is color important. Since I also have an ip4200 that I use mainly to print out documents and webpages, I use that printer to use up partially full Canon OEM inks. But with the ip4500 that I use to print photos I don't mix different ink types in the cartridge set.
Steve W.