I would not try the dry ice method or any other home remedies, Call a professional. I do PDR myself and have heard of people trying the dry ice and afterwards the paint sometimes will delaminate. If dry ice will burn your skin, what will it do to clear cote? But, its your call. If these home remedies worked. There would be no PDR technicians, and I would not have invested over $9000+ in tools and training. There are many myths of dent removal. You can do more damage with these methods than its worth. JMO