Wood boats will always show their scars. They earn many of them honorably, but unlike plastic boats, they need to have their skins ( finishes) stitched up. So a wood boat will seldom look as perfect as a plastic boat. You should seal dings and scratches as soon as possible after they occur, a stitch in time saves nine. Scuff the offended area and dab varnish early and often. It may look slightly less good in the parking lot, but the intervals between major refinishes will be longer and problems associated with letting the wood get wet will be less likely to bite you.
If you want to make it look "perfect" you have to pretty much do a 100% job.
This is because the finish materials have weathered and changed color and because the wood where the finish has failed or been chipped has weathered and changed color from the wood that has been under the finish.
the discolorations where the wood has been exposed because the finish has foiled or been dinged will not magically disappear.
Making the wood grain a uniform color can involve bleaching and staining, all of which is tricky.
So getting to showboat is a whole lot of work.
However, stabilizing and maintaining the wood is a more attainable objective.
Identify the areas that need work, sand them and "feather" back the finish surrounding them. Build up the coating to the same level.
If there were 7 coats of varnish on the deck, you need to put 7 coats on the repairs.
Once everything is back up to one level, you can give the deck a light duff with fine sand paper or a scotchbrite and give the whole thing a coat of varnish.
Areas like where the covering strip has broken away from the deck edge can be "reefed out" with a narrow saw blade and carefully filled with thin epoxy to prevent further degradation. Dings that go all the way through the finish need to be exposed and resealed. Sometimes a drop of un-thickened epoxy is a wise option. The areas around the genoa leads and other wear spots can be sanded smooth and tastefully reinforced with very light glass ( like 4oz 120g/m^2 ) they will be invisible and more resistant to chafe. Traditionally wood boats have used metal or in later years Phenolic to reinforce areas of high wear. Phenolic is a lower tech version of G-10 and is more or less mahogany colored, so it has a very low visible impact. It bonds with epoxy, so small strips can be let in where things chafe on wood.
So embrace patch work and small, on going maintenance intervals!