I finally took the "copic" plunge and bought some of the sketch markers that everyone on-line is talking about. I wanted to try them out and see if they really would be different than using my SU markers to color an image. The flower image above was created using B21 (Baby Blue) as the base, coloring all the image. Next, I outlined with B34 (Manganese Blue), going over all the black lines. I followed that with B32 (Pale Blue), coloring over everything again. The picture doesn't show the blending very well, but IRL you can still see all 3 colors. The flower image above is colored with SU markers: first I used Bashful Blue, then outlined in Brocade Blue, then colored all over with Ballet Blue. The colors didn't really blend, just layered on top of each other. You can't see any of the Bashful Blue that I started with.
Here's the final card that I created with the Copic Marker image. I did the leaves in 3 colors also: G02 (Spectrum Green) as the base, outlined in G24 (Willow) and then colored all over with G21 (Lime Green). I'm pleased with the results.