How much painted liberty lady coin?

It is impossible to say. Liberty is and has been featured on many US Coins including the Peace Dollar, Morgan Dollar, Mercury Dime, Barber Dime, Barber Quarter, Barber Half Dollar, Walking Liberty Half Dollar, American Silver Eagle, American Gold Eagle, and many, many more. Most collectors will view the colorization of any US coin as damage and it will negatively impact value of the coin. But it is impossible to say without knowing what the coin is because there is a huge difference between, say, a Mercury dime and a Morgan Dollar.