Buy her the car of her dreams as an anniversary present and let her be the one to take it to the shop so that the shop (NOT YOU) can tell her what she is doing wrong. If she views the car as just a mode of transportation then she won't be careful with it but if she views the car as something that she really likes, wants, and cares for then it will bother her that she keeps damaging it. My Wife is much nicer to our cars then I am and that is because it truly bothers her when they get messed up.....me, I think dents give a vehicle character
