AndreZA
Air-Valve Autobot!
Airbrushtutor cuts little triangles into board when he needs to isolate a colour so that he can match it. I use a single hole punch. The colour matching part is a a totally different ball game.
Hole punch and some card stock. You want it a bit heavier then paper so that the image does not show through the paper.

That is as far in the punch can reach. So I made one in each corner.

Ready to select which colour I need to pick

Pretty close after the 4th try.

Hole punch and some card stock. You want it a bit heavier then paper so that the image does not show through the paper.

That is as far in the punch can reach. So I made one in each corner.

Ready to select which colour I need to pick

Pretty close after the 4th try.
