---

I made progress this after noon. Mostly testing tools and the clear winner for removing lots of foam is a Dremel Multimax with a large scraping blade. The blade actually slices the foam and it can be removed in large pieces. I have all the removed wet foam in a couple trash bags, i might weight them next time I am working on the boat. Once the exposed foam is out, i will switch back to the wire brush to grind out the foam under the remaining deck, as far as i can.

The foam is wet on the bow side of my wet / dry line so once the foam in the stern is removed and the boat weighted, i will decide if i am going to remove the foam in the front half of the boat. It will depend on how wet the boat still is, I have no trouble lifting the bow so i may leave whatever damp foam is there.
Photo of the foam removal progress posted.