Day 4 - San Juan, Scheduled Arrival 3pm  As we approached San Juan our sunny day ended and it became apparent we would have some liquid sunshine, emphasis on liquid, to contend with. We docked near the Sheraton in Old San Juan. Skies began to look better but radar showed another line or two approaching from the East. After a few false starts to avoid getting drenched I finally ventured out.   San Juan is doing much better than much of Puerto Rico.  On the