To answer your question, the DG kits are raw, unfinished metal with plenty of mill marks. There is no case hardening on the receiver, so you are just dealing with bare steel that you will have to do a LOT of filing, sanding and polishing to. The end result will be limited only by your patience, skill and persistence. I did an Armi San Marcos 1851 Navy kit a few years ago and put many hundreds of hours into it, but the end result was the equivalent of any Colt, just without the Colt markings.
Mechanically, the kits generally work right out of the box, so theoretically you could just assemble it and have a shooter, albeit a crude one.