Either strip and reseal or paint. But either way, it's a huge job. And if you haven't done this kind of work before, it will take even more work to get an acceptable level of finish. Consider what your time is worth and whether you want to spend it that way, or if you'd prefer to re-face or replace your cabinets.

you can sometimes swap an upper cabinet door or a few of them for glass fronted doors . Can make a difference at eye level along w good lighting and maybe a light backsplash..... if changng all the cabinets isnt going to happen....

Birmingham Urban Style Kitchen Remodel · More Info