After that, talk to the paint people. Before buying my wooden boat with wooden spars, I spent a lot of weeks at the WoodenBoat School. The care and feeding of wooden spars came up several times. The choice of wood for spars is all about strength and weight. Resistance to chafe, moisture and rot is low on the list of priorities.
Paint hides wood discoloration and potential rot areas.
Those masts should come down at storage time and kept out of the sun. You really don't have a choice. Care for them. New spars are a little pricey.