only two ways you're gonna get some sort of print on your base:
1 cut out a stencil in your basematerial then fil it up with basematerial in a different color, then stonegrind ....
or cut out a chunk of base until you reach underlying material, remove it, put a sticker on there, then clear epoxy a clear piece of ptex on there.....
only 2 ways i can think of that "might" work...
and both will most likely fuck your ski up....