I am sure i read on here that lego was imperviable to most glues , so what about making a lego plug and then casting resin and glass fibre to make a hull ,once cured you just break the mold .
daz
lego will glue happily with plasweld and the likes, also most resins both epoxy and polyester will bond to lego... infact sometimes far too well ( if you know what i mean !!!! ) so depending on what you are trying to acheive then there is a material to do the job...
building in actual bricks is fun, and the GRP springer hull has been done before.... i like trying new things !!!- its half the fun and i like the challenge....
just trying to plan why type of springer to actually make ? a ;ego technic springer ?- a space lego springer ? or a huge gigantic LEGO DUPLO springer ( with the hydrodynamics of a sub post office ? ) ?