Any junk yard or scrap pro­cess­ing facil­i­ty law­ful­ly in exis­tence on the effec­tive date of this Arti­cle which is with­in one thou­sand (1,000) feet of the near­est edge of the right of way and vis­i­ble from the main-trav­eled way of any high­way in the Union Coun­ty pub­lic road sys­tem, shall be screened, if fea­si­ble, by the Union Coun­ty Board of Com­mis­sion­ers at loca­tions on high­way right of way or in areas acquired for such pur­pos­es out­side the right of way so as not to be vis­i­ble from the main-trav­eled way of such highway.