It is not as daunting as it sounds. I used a low voc lacquer thinner that flashed dry quickly. Do not set rags or can of cleaner on roof!
I went right over the Dicor sealant. Make sure when you put the Eternabond down it is where you want it. It is not moveable. Then make sure you used a roller - a small wallpaper seam roller or a larger laminate roller and roll, roll, roll to get a good bond. If you want you can put a little Dicor or ProFlex along the edges of the Eternabond, but not necessary. We did the roof 3 years ago and I just pressure tested the trailer and not one leak on Eternabond seams.