Not sure what Heel and Toe patination is .
I only had them on the front. The rears didn't need replacing really they were 3.5 yrs old and had gone down only about 1.5 - 2 mm over 35k miles. Maybe another year or so before they started to age too much and need replacing, but they were ok at the time.
I mean, yeah , i knew to only use them on the front
I want to get some new (well 2nd hand) alloys at some time for my car, maybe have them refurbished black to give a more stealth look to the car , whilst being big enough to fit over supra / ls 400 4 pot calipers at the front.