How to separate parts of a figure?

I’ve modeled an entire figure that will ultimately be converted into a 3D printed model. This 3d mprinted model will have movable arms, head, etc.

How do I successfully separate the arms and other parts from my complete figure in preparation for making them 2mm thick and 3D printable? Or, is it better to make the thickness before I even cut up the figure? I need to have clean edges that will perfectly align together afterward when the 3D printed parts are completed.

Is there a tool like the KNIFE tool that I can use to cut my figure at the right places to separate the parts?

Of course, I know I can dissolve edges between various parts, but that will create gaps and then the finished parts won’t fit snugly once they are made.

Should I make doubled knife cuts and try to separate the parts that way??

I’m used to using RHINO, in which you can save SELECTED parts of a piece, and then work on them individually. In Blender is there a way to save selected parts of a figure and not the whole figure?? That would allow me to separate the figure along my chosen dividing lines and then have independent pieces to work on.

Larry

V (on keyboard ) will separate vertices eg where there was 1 there will be two :wink:
so for an arm loop select where you want the cut press V then select any vertex on arm press L (linked) and it should select the whole arm
then press P (part) to make it a separate mesh (if you want to)

Wow, thanks for the speedy response. I will do it! Super appreciative!