I am coming up on three years also with 2 repaired rotator cuffs. Last year after repairing my mirror I cleaned the area for caulking with acetone and it stripped off the Zeps rather easily I was not real careful with it. I ended up removing a larger area just to make it more uniform with the acetone. I tried ammonia but that did not work nearly as well as acetone. After the caulking dried I reapplied the Zeps and and you cannot see where it was reapplied. I have not had any peeling as yet and don't know if it peels because it is applied too thick or it peels because it wears off with time and washing and becomes too thin, assuming the prep work was good in both cases.
