Hull and Topsides
Old antifouling can be really dificult to remove, but if it has built up in thickness then it is a job needing done. A variety of scrapers are available but care needs to be taken not to damage the gelcoat. Hard work will ensure a smooth surface for re-application.
Inspect the keel and keelboats for signs of rusting or pitting and wear at the keel to hull joint that may be more evident after winter layup. If anything looks suspect, ask the experts. If there’s a lot of pitting on the keel it may need taken back to bare metal and an epoxy protective coating applied.