ABS has no place in hull construction. It is susceptible to chemical attack, delamination and degradation. PVC Foam is more economical than...
I would stress that attention should be paid to the use of the correct material for structural areas , the direction of stress loads in those...
Boston Whaler likely does not use foam poured into molds but foam blocks machined with a 5 axis CNC Router. The Density required these days...