As stated earlier, apply some more MicroSol and after the decal has softened up again, CAREFULLY (I can't stress this enough ) use the brush to smooth out the wrinkles. Work from the center of the decal out to the edges to make sure there is no trapped air under the decal.
Another trick I have used is to carefully sand down the ridges of the wrinkled decal, and then touch up the white spots that are created with paint. After you seal the decals with a coat of Future and then apply a dull coat, the repair is almost invisible.