Yep, concur with Vis.
My D boat sits out all winter in the So. Cal. high desert. (big wind, some rain, some snow, lots of dirt from blowing dust) When time comes for spring cleaning she often looks horrible inside.I should invest in a $30 blue tarp to keep some of the dirt and rain from blowing in. Anyway, I'm always surprised at how nice she cleans up inside. Looks brand new after a couple of hours of TLC. This is good, as the Admiral is, kind of a clean freak.
Inside;
Soft Scrub works wonders (the industrial strength kind from Home Depot is best). Rinse well and follow up with regular old spray Pledge. (if she looks good after using the Soft Scrub). She'll look great inside.
Outside;
You can do the same........... or do the whole high speed polish thing........ depends on how much work you want to do and what result you except. Sometimes, just a really good cleaning will do wonders. Then wipe the whole exterior with Marine Penetrol. Actually, I've used regular Penetrol, 'cause you can get it at Home Depot. The oils in it feed life back into the gel-coat. Then polish her out next year. She'll end up with a nice glow, but not that boat show mirror finish shine.
WARNING............ don't use Pledge on any surface where you may be walking or stepping. It will become very slippery, particularly when wet. You can use the Penetrol in these areas, If you wipe it down very well the next day, AND it can sit in the sun for a week or two, before going sailing.
Gel-coat in interesting stuff and can, sometimes, be made to look brand new by wet sanding followed by polishing. We're talking very fine sanding, like #1000 followed by #1200 to #1500. It's a ton of work though. (why I keep putting off doing it to my own boat)

Well, I am pushing 60, after all.
Best Breezes,
SK