George, The metallic paper that presented the original problems is the Breathing Color Vibrance Metallic, but Red River's metallic gave similar problems. I suspect about any metallic brand would have yielded similar results. Canson Baryta Photographique was also printed on, and auto-cut on, this particular machine. The baryta paper never reveled the dust problem, as the prints on the baryta emerged quite dry and un-tacky from the machine. In the end, the problem of dust contamination boiled down to:
1) Metallic papers emerging from the printer with ink still tacky enough that the printed surface was able to attract and bind those dust particles generated by the cutter mechanism
2) My not keeping the printer as clean as was needed
Since my original post, I have found much better results by:
1) Greater attention to printer hygiene, in part by using an old but excellent Electrolux canister-style vacuum inside and out, with attention paid to the exterior panel immediately below the cutter path. For anyone not familiar with Electrolux vacuums from the 1960-1980's era: These are tremendous machines and be bought and maintained for reasonable prices. I'm quite pleased with the pairing of the Electrolux and the 9900 (see photo).
2) Increasing drying time between head passes (+30 seems to allow the print to emerge with a much more cured surface).
3) Delay the cutting of the print for 15 minutes, or longer, after printing is complete, as accomplished by Cutter Off in the driver dialog. The point here is to delay the onset of the "spray of paper cutter dust" until additional ink surface curing has occurred.
I'll again state that my becoming so aware of dust embedded in the print surface pertained, at least in part, to the perimeter of affected prints have a 3" black border. It may be that "normal" photographs don't present the same hazard.