I agree sciencemonster. But the fact is (and I think most will agree with this) that an original paint job -even in marginal/poor condition will often be more valuable to a collector than one that has been re-painted regardless of how professionally it was done. It's not original any more. As the number of collectible specimens gets smaller and smaller (and approaches one ) the value of that un-molested original gets higher and higher. The repainted example takes itself out of that number.

It all depends on supply and demand. And that is different for any manufactured product depending on how many of them were made, how long ago, how likely they were to survive in original un-molested condition, how "special" or significant it was, and what the latest fad is in collecting. Both the supply and demand variables depend on many factors.