I personally think if you did the rust proof yourself, then not only will you save money, but will do a better job as well. I have seen the way dealerships undercoat cars and trucks. What a joke! I have been undercoating mine and the family cars since 1986. My 88 T Bird is coated from front to rear bumper. Thick! Never had the coating peel off, or rust. And the moving parts are not coated(neither are the bolts). If anyone is a fan of the 88 T Bird turbo, then let me know. Would love the talk and exchange ideas about restoring them.