remove all the windows,clean all the surfaces,reinstall with butyl tape then use the eternacaulk on the outside of the window
use the eternabond tape on the roof seams and around all the vents and such
remove all the old caulk from the storage doors/trim moldings/porch light..etc, replace with eternacaulk
mineral spirits on your finger or a caulk tool will work wonders in making it look nice
be sure to properly clean all the areas before caulk with some sort of solvent cleaner
an oscillating dremel type tool with the plastic scraper head works great for removing old caulk
follow eternabond prep instructions for the eternabond tape
PREP IS THE MOST IMPORTANT THING WITH THE TAPE AND CAULK