Question recalled.

Long term if you want a proper job done and keeping the guitar use either paint stripper or a heat gun. Especially if it has dents your can try steaming them out once you get to bare wood.

If your selling it there's little point into putting too much time into the job.
Keep in mind a repainted body can be worth less an original paint job in bad condition.
Consider if you are selling to just sell it in parts or at least work out if you will get more for it that way.