Now I know why I detest the timber industry...
Living here in Oregon, I have heard similar stories from some of the divers who do this kind of thing. To the point where they have to do a hazmat disposal of their drysuits due to the toxins in the waters they have been working in. And if they have even the slightest amount of exposed skin, they get really nasty rashes that take a long time to heal.
From a personal perspective, I would like to see hemp utilized more as a replacement for timber. Grows faster and doesn't need as much refining as timber.
But that's another topic best left for somewhere else...
I wish you the best of luck on your training and attempts...
If all goes according to plan, I will see you in Ibiza...