The correct shims between the spindle and the knuckle for Camber. Is it loose or is it sticking from side to side and you have to correct constantly........To tight of Ball Joints can cause that.
My son used a product on my Chevy II that was called Shootz on the rockers....I think? Kind of rubberized looking and feeling. Went on clear and he painted right over it. It has been on the car for 28 years and no chipping or peeling........YMMV