Digital BW, The Print

I'm using an Epson 2200 with Piezo NK7 inks.  Tried to make some B&W 
8.5 x 11 proofs with Moab Kayenta paper.  I like the selenium toned 
look of the images but on every print I made, there were scratches 
across the bottom part of the print.  When I printed the same photos on 
310 gsm Hahnemuhle Photo Rag Bright White, the prints had no scratches 
at all.  Are the scratches caused by the light 205 gsm weight of the 
Kayenta paper?  If so, is there anything that can be done to eliminate 
them.

Thanks,
Ron