A true waxed hood can lower spray onto the windshield, preserving water and dirt from swirling up for the duration of rainy driving.
https://alpha-wiki.win/index.php/Understanding_Different_Types_of_Chips_and_Cracks_in_Your_Windshield_11791
A appropriately waxed hood can lessen spray onto the windshield, preserving water and grime from swirling up all over moist riding.