Well decided to go with dicor paint. But that will be next years project.
Not enough good weather left in Seattle by the time I get back to attack it.
But did get up and Simple Green and scrub it, followed by Bartenders friend, car wash then sprayed it down with 303 Aerospace and it rally looks good now.
Sealed up vents and screws and such with Dicor Lap Sealant and the shower skylight with SB140.
All in all its coming together.
Thanks for all the feedback you people are great
I was thinking of running the Dicor prep when I do but if ya'll are having good luck just by scrubbing it up real good and maybe some light abrasion I may skip that..thoughts?