[san rensho]

Just water and a soft brush to clean it. Then I use Aerospace 303 (available at marine stores). Apply it with a throw away brush, don't spray it as the overspray makes a mess. Really goober it on, more is more, about half the bottle. At first it will leave a foamy film but it goes away quickly.

I do my top maybe twice a year, it rains a lot here, and the top always beads water like the paintwork.