exactly, this way more light passes through as there are not two layers of rubber directly over the bulb. i think the reason for the dim spots on my cluster is because the bulb's light is not able to radiate as far.
and yes, this would allow multiple colors on a cluster. the Gels are actually sheets, not a liquid. you could cut itand fit it where you want. for instance, your gas gauge could be two different colors. maybe blue all the way down to a 1/4 tank at which point you could make it red. Something along those lines might be possible. I am going to call around tomorrow and see if i can't find a place that sells the gel locally. i will post pics and results afterwards