Rule of thumb is that refinishing will negatively impact the value of a firearm as it's no longer original. Exceptions are with rusted and pitted specimens as their worth is generally gone to begin with. Some people like a pretty gun to shoot and polish up but if it were mine, good honest wear isn't an issue and I'd keep shooting it until it fell apart.
The subject of refinish should be approached without any consideration of resale.If you have a gun that is rusted and you want to improve its appearance then refinish is the way to go.If you just want a nice looking shooter and don't care about resale value then refinish would be the way to go TO MAKE YOU HAPPY. To a Collector a refinish kills the value and would say to preserve value leave it as is.It is a judgement call so just do whatever makes you happy to meet your goal.