I am just about done putting in a new transom and moving on to the
stringers. The hull/old glass roven that I will be bonding the new roven to
is extremely dirty looking, mostly black from years of being wet I think.
What is the best way to get it as clean as possible for bonding the new
stuff to. Is sanding the only thing to do? Has anyone used TSP for boat
cleaning, paint preping etc?

Thanks