If I replace the control knobs with the exact same kind that were on there, would the guitar still be considered all original? I am doing this because the ones that are on there have the paint coming off of the numbers and it looks ugly. It's a MIM Fender Strat.

If it was a vintage strat then the original parts thing might be an issue. But changing the knobs on a MIM strat isnt going to kill its value down the road.