Originally Posted by jyasaki
Those plates Office mentioned are not (as far as I know) hypalon or PVC, but are designed to be glued on. They are some sort of hard plastic, but I'm not sure which type. Some friends have these on their hypalon boat, seems to hold up well.
Another option is to have the characters die or laser cut and inlaid in a surrounding frame. Looks good but fairly pricey.
As to the stickers, clean the surface with solvent (acetone should work) with a quick wipe, then give the adhesive on the sticker a quick wipe with acetone on a clean [mostly] lintfree material (paper towel or a clean old t-shirt.) Helps the adhesive grab. Going lightly over the edges with something like Gorilla super glue should help prevent edge peeling (which will ultimately result in the whole thing coming off.)
The newest generation as of late 2014 are PVC. Your registration is silkscreened directly on. There is a small piece of vinyl where the sticker goes to promote adhesion.
For hypalon, they simply sew a piece of hypalon on to the back..it makes it kinda thick, but it will flex okay if you fold the boat correctly.