i user Poser often as a base for my "heroic fantasy" serie..
it's difficult to prepare the model for 3D printing as Poser is made for Digital picture at first.
you will need to pose your model, then export it as .obj format to something like Netfab to correct the problem of the mesh and try to remove any hole in it . Then when all holes are closed, you need a software to put a "Skin" on it that make it "watertight one mesh solid".
boolean Union didn't work well because it create "wall" inside the model that are difficult to print.. (like between the shoe mesh and the foot mesh...)
a software like materialize magic do it well (it was made for..).. but it's a professional software..
you can also "clean"your model by hand in software like Hexagon (free)
ps : you can use any model from poser for your own need (like Victoria female serie) but you cant give away any model made on a Daz3d base model for 3Dprinting (daz doesn't allow it, not sure if they really can forbid this..but look at Aiko model comments on thingiverse for other information).
But you can use something free like Antonia polygon, or Apollo Maximus