Newbie How much finish work is normal?

All:

I have been lurking and scouring the posts in preparation for my first CNC router build. One question though is if your making signs/3d scuplts, routed picture frames etc. how much finish work (sanding,prepping) do you normally have to do before you consider it paint/delivery ready? I have a couple of Non-CNC signshops willing to sub the wokr to me but finish time once off the router is unknown to me. Any rules of thumb or experience to share?

Mostly will be hardwoods (oak, cherry,walnut, etc) with some soft thrown in occasionally.

Thanks,Steven


PS.

Will be a KRMX02 machine (4'x8') type running a 3.7KW water cooled spindle