I have a question that is probably quite basic to anyone who has CNC experience: if I have a program for a three-dimensional shape (say, a Volkswagen Bug), can I mill out a large model a foot long and a small one an inch long?

I'm interested in creating some models for an N-scale model railroad. At 1:160th scale, details are easier to check if I create a larger protype first. Also I may want to make the same model in 1/87th scale.

So, can 'average' hobby-grade CNC software scale a complex shape up or down?

Thank you.