What adds to the value, what does not?

[mhorowit]

If I change the worn-out tires, I'm doing maintenance and I haven't done anything to increase the value of the airplane. OTOH, no one would argue that an engine overhaul would raise the value. I don't think o/h the carborator would increase the value, but a recent covering or paint job would.

Is there a general rule that I can use to say "this action is simply keeping the a/c airworthy but this action may additionally increase it's resale value"? - Mike