If you are laminating your banner you can install metal grommets into the laminate for use outdoors . Use a heavy laminate, generally 5 mil or more thick. Attach Hang Tabs over the laminate wherever you plan to install the grommets. Press the grommet through the tab and laminate. Never install grommets through the paper, even if the paper is laminated.
Water can easily seep through the grommet and ruin the paper.
If you are scanning your designs manually through the scanner unit, strong black and white images will reproduce best. Grays tend to print muddy. If you're using a lot of grays and are having trouble reproducing your designs, try switching your machine to photo mode and running them through the scanner that way. Your PosterPrinter will print posters from various Windows based software. Printing posters this way is a breeze.