I just replaced a skylight and I could not find any way to remove the two year old dicor off my rubber roof. I did find a slightly smaller skylight so I got by with the old dicor in place. Goog luck.
Did that. In the first 12-18 months it is still soft, you can scrap it off without heating. Rubbing in some methanol or denaturated alcohol might help to clean it off without stripping too much paint off the EPDM rubber.
Dicor cures VERY slow - days, not hours - and shrinks A LOT when curing. Apply it generously.