A skin care composition for stimulating selective catabolysis in cells of keratin surfaces comprising at least one autophagy activator and at least one proteasome activator, and a method for improving selective catabolysis in cells of keratin surfaces by treating with the composition. The method includes the steps of providing the casting having a core material disposed in the internal passage; providing the decoring apparatus configured to selectively oscillate the casting and selectively rotate the casting; securing the casting in the decoring apparatus; introducing a quantity of shot into the internal passage of the casting; oscillating the casting; and rotating the casting. The first light-emitting element is beside the first light-incident surface.