Thanks for all the nice comments! Even the "cute" one is appreciated.

My wife thinks they look "cartoony", too.
Here's a little foam bluegill that I cranked out this evening. One of the things that I've been enjoying about making these is the instant gratification. From concept to completion is about 45 minutes.
I don't know how they fish. the field test will most likely be this weekend, so, stay tuned... It's been said, "Show your local fish something different." I don't think mine have seen these before.
I haven't tried coating this foam, but I will say that if I squeeze two pieces of this foam together with some glue, it seems to compress a little. This suggested that the glue goes in a little. I've been using a superglue called Bondini. It doesn't melt this foam at all.
I've given some scrap of foam the "bathroom sink test". It foams right on top of the water. I dried it off with a towel and only the outside was wet. I couldn't wring out any water.
Here's an idea for twister tails for mold masters: Rather than coating this foam , how about trying a plastic lid from a coffee or peanut can? It is very easy to cut with scissors or a utility knive. It's thinner than this foam. It has a nice smooth surface, so mold material shouldn't stick too it.