a wax that will hold up great, and can be easily applied by hand, would imo be collinite. It is what I use for my boat, it is incredibly price friendly, and a very popular choice. Even though I have a porter cable 7424 orbital, I usually still apply/remove by hand.
- paste wax, will give you better durability
this has one multiple awards for best marine wax, also what I use
- liquid wax, will be easier to apply.
these are both GREAT waxes for your boat, and again, the price cant be beat.
read up a bit on those two, you will be pleasantly surprised.