Check it! A bit of art on a tablet that will be sold in a...

Check it! A bit of art on a tablet that will be sold in a special auction! Or at least it was, but it seems wacom surfaces are not suitable at all for brush pen ink! Looking at it will cause the thing to smear. Oh noooooooo :(
Artists who are better at traditional art than me, is there a solution? Different ink? Paint maybe? Or is it a dumb idea I should give up on?
Maaan it was gonna be so neat