Originally Posted by MarkSF
When paint is dry, move jack stands, paint patch where jack stands were.
Often this should be a service provided by the yard. If you're on a cradle rather than individual jackstands that might require a lift to reposition the cradle. OTOH if there's a jackstand available you can substitute one for a cradle pad and back off the pad for painting.
HOWEVER... this needs to be done with care and properly - a mistake here might drop the boat on yourself!!
The best you can do with the bottom of the keel, generally, is the slap some paint on once they lift it for launch.. try to get the boat on the lift before lunch, and let it dry for an hour before launch if you can. Not ideal but better than nothing.
Matching paint, hopefully you'll find an old half-can somewhere.. otherwise you may need to try a test patch for compatability. We generally use two coats and get 2 years with ablative paint.. we will shorthaul for a pressure wash or a rub in between a time or two.
The Beneteau may have an iron keel.. this will need proper epoxy sealing to avoid having to deal with rust every time you haul... this is a job worth doing right (or have done right) originally - it will pay dividends down the road.
It's difficult to assess keel fairing issues on-line.. I suggest you consult an expert or a knowledgeable sailor in your area.