Micro Sol is very aggressive. I advocate using Micro Set first, only using the sol if the set doesn't do enough. When you DO use sol, you must not touch the decal at all after application. It will bubble up, and maybe even crack, but should nestle down when it dries. It is best to lay the surface with the decal on it as flat as possible so the solution does not drag parts of the decal down a slope. With good decals I find I do not ordinarily need to use Sol on most areas, only where there are louvers, bumps, or something like that that have a lot of surface curvature.