SEBS (Seebeck Effect Buoy System)

I just found out a few days ago that there is a MakerSpace offered by Ting Mobile near my house that offers the use of CAD software computers and 3D printers to the public. I am planning on making a new prototype for the buoy made of ABS plastic. the good thing about ABS is that it is water resistant, strong, and non-toxic. The bad thing about it is that it really is not recommended for extended outdoor use which worries me but i'm thinking there is probably some protective substance that could be applied onto the finished product to help give it more shelf life outdoors. I'm also looking into the price estimate to use the MakerSpace and 3D materials usage which I am thinking right now to be possibly around a good $30.

To prevent water from accidentally being splashed onto the circuitry at the top I hot glued a clear cylinder covering from an old tape container to the top of the buoy. For the side of the covering that is facing the USB opening of the Boost Converter I cut a snug fit hole and in the process of trying to find some material to fill in the sounding to keep water from leaking in.   

Thanks to comments from Josh Starnes, I learned that there is a better component that could replace the peltier modules which would help generate more electricity. I am going to try to obtain TEG thermo electric generators to apply in a future prototype. I am also going to paint the top heatsink aluminum plates black to help absorb more heat.

To make the temperature between the foil plates and the peltier modules transfer more efficiently I added a thin layer of Arctic silver thermal paste in between.