Just doing a bit of testing. I watched a video that said you could do Copic-like coloring with SU markers. I did find out some interesting things. The first two images are done on SU water color paper with SU markers. The third image is Copic. You can’t tell so well in the pictures but for me; it just seems a lot easier to use the copics. Would I use the water color technique again? A most definite yes as I have all the colors of SU markers and that gives great variety. I don’t have that many Copic markers. What I learned using the water color paper is about the grain. I found in the first image the color did not bleed as much and the grain of the paper is going in the vertical direction. The second one I had the grain going horizontal and found it difficult to maintain the color. The surprise was how brilliant the watercolors come out compared to the Copic. Flesh tones were very hard to do with the water colors. I also found that no matter that I used Memento or Staz On and let them dry overnight, they still picked up the black and made the skin tones look muddy on the water color paper. I never have that problem with Memento and Copics. Image is from Oscar’s Door County Rubber Stamps. Fun on the farm series, this image is named Precious.
I hope this is helpful in some way to you.