I could be wrong about this style of decal...but I have had experience with 3m product decals we used water and detergent mix sprayed onto the surface you are applying to then moved the decal around until in the right place and all lined up...then squeegeed them to remove the moisture and then the backing sheet...not hard if these decals are the sameMy only concern would be the numpty installing it (me) stuffing it up.