Cutting tool help

What you need is called a razor saw. This usually has a seperate blade and handle and the saw blade itself is very thin, the teeth on the saw range from 40-60 teeth, depending on the blade chosen. The back of the blade has a reinforcment to keep it rigid and it is very sharp. They usually have a couple of different depths available as well. Two brands I can think of off hand are Xacto (like the hobby knife) and Excel, which is usually a bit cheaper. A set would cost you maybe less than $20...

Thanks, jimbot58.  I picked one up today at the local Michael's.  Will try it tonight....

Before you start slicing away with that saw. What you really need is a micro razor saw, not just a hobby razor saw. Big difference between the two.

A standard razor saw has too wide of a kerf. The width of the saws cut. 

Here's what you need:

or you can chuck the blade in a #1 hobby knife handle.

 

This unit is from UMM-USA which is also sold by Sprue Brothers, I used to stock them but I am out.

I stand here with egg dripping from my face as I admit that I wasn't aware of micro saws. I always believed my razor saw was the "bomb". Forgive my improper advice....

A micro razor saw allows you to be less invasive when cutting parts. Again the kerf of the cut is hair like thin. You can literally slice off a radiator off the bottom of a 1/48 Spit and reinstall it after insert radiator details inside. Then put it back on without any clue you removed it.

The other method you can use if you don't have a saw is to use sewing thread which I demonstrate in my post How To Cut Curves.