I just found out that frankenturrets are not affected by gel. They are coloured, but they won't bounce or slide themselves. The player is affected by this. So you can jump on kind of a mobile gel platform. You will also bounce off the sides. Unfortunately this does not work with speed gel, only with bounce. This figures out an interersting new puzzle concept.

That's pretty cool, covering one in gel, and then moving up to a high ledge where the player can then jump up.

I might use this idea at some point in a co-op map.