Sorry, can’t help with suggesting a ‘trusted tradesman’.
Agree with Nick though, that it’s as well to strip right back to bare wood before re-coating. Better to deal with soft spots rather than discovering them at a later stage. Atalantas are well known for harbouring less than sound areas on the decks where water has been allowed to stand. Just a fact of life and no reflection on former ownerships – but it does happen all too often.