Wow!
Please discover and report on that 17 year bottom paint. I want to switch to using that product.
My 2000 380DA had a tough as nails primer, covered w/ black ablative paint.
Unless a barrier coat is going to be applied, then the existing paint should be pressure washed, scuffed and the new paint applied.
This reply shows my bare hull protected w/ five coats of epoxy barrier coat, then Sea Hawk Biocop TF. This is my first time using this paint and I have been satisfied with this product.
https://www.thehulltruth.com/12558935-post19.html
Note that bottom paint is extremely toxic, so appropriate measures and protection are required. Do not open sand! Wear gloves, eye protection, lung protection and a space suit.