Very interesting - certainly a very creative use of "source materials"! I'll be interested to see what the finished tug looks like.
I've also wondered about the boat potential of fibreglass/GRP bathtubs, in this case for a manned sailing boat rather than a R/C scale model. I often see old bathtubs discarded on skips and thought they would be the ideal shape for a barge-type hull if you cut the rim off! There seem to be quite a few technical problems, though, which I'm not sure how to solve:
- what's the best (and safest) way of trimming the fibreglass tub to shape?
- how do you fill the plug hole? (alternatively, if it's near enough to the end of the bath, could you put a piece of tubing into it and use it for the rudder post?)
- how to get a smooth surface on the outside of the tub? Would car body filler (or similar) work?