Well… thats what i thought and thats why i started messing with the settings. This is moisture. The paper needs to dry for 5 minutes. Maybe more. I also reduced the ink density of my Epson Ecotank a bit. Now im able to get pretty good results with 185c and 60 seconds. No cloth or anything else. Although i can still see the marks that i mentioned first when i put the sheet under a light. They are not that visible though anymore. The sheets are from alibaba… Im looking for another supplier. Any suggestions? Also, are all aluminium sheets that easily scratched? Even a simple wipe leaves lines.