RWSlater,
Years ago and not sure which governmental agency, a component for anti fouling was ordered removed which helped anti fouling paints to dry quicker than now to include in colder climate conditions up to a certain point. This included Petit paints as I used mostly Trinidad and in colder climates while on the sling and/or on stands would take a long time to dry. The problem is where the straps and stands the boat would sit in on newly painted surfaces would be affected, not in the water. I did have to leave the boats sitting much longer to dry hard which is one reason why the tempature requirements. I decided to use plastic though on the straps going over the new paint as well as on the stands which did help. I would adhere to the temp and before moving the boat, pick the new paint with your finger nail to see if it is still too soft to move. I was a full fledged dealer now retired.