ive purchased and restoring a 1963 galaxy 500 it in really good shape except a decade or so ago the owner started to remove the paint to get it repainted he only did about 3 panels and then he stoped and never repainted it . he kept it in a barn put those panels have been done completly in by rust other than that it's in really good shape. im gonna replace those panel from another of the same year how would this affect the value of the car.