Reddit mentions of Meguiar's M5032 Marine/RV One Step Cleaner Wax, 32 fl oz

For the exterior, here is a copy and paste of a previous post of mine. Everyone may give you slightly different advice as there are many valid ways to do this. This routine has worked very well for me for many years.

• Clean well with soap and water and a good microfiber cloth. (removes all dirt and oil build up.)
  
• Dry it with another cloth. I like a big cotton towel.
  
• Clean with a good oxalic acid based cleaner such as Star Bright hull cleaner, or The works tub and tile cleaner(NOT THE TOILET CLEANER) Applying with a one gallon pump up sprayer works great for me. Rinse well. This removes any rust stains.
  
• Dry again.
  
• Buff with an oxidation remover. I like this one. I apply with a 10 inch random orbital buffer and application bonnet, and remove while still slightly wet with the same buffer and a wool bonnet. In heavily oxidized areas you may need to do this more than once. If you do not have oxidation, feel free to skip this step.
  
• Next buff again with a cleaner wax. I like this one same process as above, but let it dry to a haze before removing.
  
• This will leave you with a clean hull and a nice shine, if you want an even deeper shine, make one more buffing pass with a nice marine wax. I like this one
  
  It sounds like a lot of work, but once I got the process down, I found I could do all of these steps on a entire 23' boat in less than 4 hours, and it leaves it looking like new.
  
  Edit: I forgot to mention, for the outside of the windows I like this stuff. It cleans as well as a normal glass cleaner, and causes any water that hits the windshield to bead up and run off. This is a nice bonus for many boats as they often do not have windshield wipers.