Actually, if you get past how it looks right now, this is actually a really clever idea as a "first step".
For example, with the white paint removed you could now paint the inside of the materials with any colors you want - even a mix of colors. Heck you could probably stick cartoon characters in there and then paint over them. This is cooler than the other projects we see around the internet where someone paints the outside.
Using this technique I could see some really creative (even if it was just to make a black one for example, looking iBooks. And the results would be you would keep the "gel"-like outside surface.
- Steve