Sand paper is your friend.
It shouldn't be too much trouble to rough sand the second layer cloth edge down to the first.
Once you get a good feathered edge started you can begin using finer sand paper to feather the edge until it is almost seamless. A little bit of resin, one or two coats will be all that is needed to work out the rest of the seam. Then you can begin fine sanding and polishing again.
