If the boat hasn't been kept up with meticulously, you may need rubbing compound, especially on the deck, and especially on the black stripes. On the hull, you may be able to get away with just
Meguiars Oxidation Remover. It's not as aggressive as rubbing compound.
That product is a good choice for keeping up with oxidation on the deck annually. To get the shine back, follow compounding or oxidation removal with their's or some other brand of
polish, which is all you need annually on the hull. Polishing may be all you need on the hull annually.
I prefer using a
pure wax product after a good wash after polishing, rather than a
combination polish-wax. With the latter, you have the material removed in polishing suspended in the wax coat. Once annually is probably enough for the hull, but you'll want to wash and wax the deck more often than that during the season.
I'm not at all disagreeing with Frank about covering, but it's pretty important to have a cover fitted so it can't flap in the wind and rub on the boat. That can leave rub marks in the gel coat. And as UV resistant as Sunbrella is, it's highly susceptible to wear from rubbing. Most boat and RV owners don't use covers.
Another thing that UV kills is tires. Barb sewed some tire covers, including for the spare tire, we used when the trailer was parked. You can buy these through most RV supply stores.
If you use bleach for mildew abatement, keep it away from the stainless steel. We also use vinegar for water spot removal, but Meguiars also has a
product for that. It's best if you don't use hard water in the first place, if you can help that. Our outside faucets don't have softened water, so I bought a garden hose adapter for the kitchen sink. The Mr. Clean wash/rinse attachment can also help fight water spots, but refills don't last long and can get expensive.
I remove the running rigging and dock lines annually, and wash them "manually" in the washing machine with Woolite. Don't use bleach. By manually, I mean not using the agitator, which can really tangle up the lines. I fill the tub on the soak cycle and wash the lines by hand, followed by 2-3 rinsings. I use the washing machine rather than the sink for the spin cycle between wash and rinses, and after the final rinse. The anchor line is usually muddy and gets washed in the yard.
You can fight mildew and mold developing in the bilge by propping up the cushions and taking the bilge covers off during storage. A 24x7 Nicro Solar Vent will also help. The most critical thing is keeping the bilge dry and the most frequent source of water in the bilge is around the chain plates. It's worth resealing them periodically. It's also worth checking the screws that hold the windows in place. Have someone with a screwdriver on the outside. It's critical they don't turn the screwdriver or let it turn while you're below tightening, which will tear the sealant around the screw. Then go inside, pop the screw caps off, and tighten the nut on the inside while they keep the screw from turning. Also check where your steering and throttle/shift cables go into the boat from the motor and make sure they're well sealed.
Hope this helps,
--
Moe