A LSS has a display of cards where they used glaze pens to color on acetate. They offered a class a couple months ago, but I wasn't aware of it. Anyone know of a video showing this technique. They said to soak the tips of the glaze pens in nail polish remover to make them flow smoothly. The coloring was very transparent and smooth. It looked as though they had stamped the outline of the image in StazOn or something like that.
I think i did this or a similar technique at a stamping class. We used a blending pen with a brush tip. The blending medium was alcohol based. The image was heat embossed because the slightly raised outline kept the colors in place as they got really liquidy with the blending pen. Staz-on would not work because the alcohol in the nail polish remover would make it run.
I think "jeferbrooks" is right - they did seem to have a slightly raised outline. Thanks for all the info. I'm going to check the videos and then maybe re-visit the scrapstore and see if someone there will give me a few pointers.