A golf ball comprising a layer formed from at least one of a thermoset material or a thermoplastic material throughout; the layer having a treated region and an untreated region; the treated region extending inward from an outer surface of the layer and comprising a UV resistance composition; and the untreated region not comprising the UV resistance composition. For example, the treated region may be infused with the UV resistance composition. The layer may be a cover or even an inner golf ball layer, which can sometimes become exposed during play. The UV resistance composition may be formed from a mixture of an ultraviolet light absorber (UVA) and a solvent, the UVA being selected from benzotriazole type stabilizers, hindered amine type stabilizers, phenolic type stabilizers, triazines, or combinations thereof, and the solvent comprising at least one of acetone, methyl ethyl ketone, methyl isobutyl ketone, ethyl acetate, or butyl acetate.