I would say - maybe
water damages are sometimes bad - even if the look tiny.
the w760 has 2 ribbon cable keypads.
the contacts of the non working keys can be burned - in this case a repair can be tough - but with conductive silver would a repair be possible.
on the other side - the keypads are sold on ebay - but those parts can cost a fortune (up to 50$ together, the complete phone cost 99$)
so, fixing it would be the best way.
here are some youtube videos (take a look at the video list)
the keypads are looking similar to this
clean the keypads carefully with rubbing alcohol and a soft cloth