OK, I have to admit my "dirty little secret". I don't consider it important - at all - to
use any kind of "prep" for decals. I float my decals on using just distilled water.
Then I wick off the extra. Then I apply Solvaset and wick it off (using small pieces
of tissue held in tweezers). Let it dry (mostly). Reapply more Solvaset and wick
off the extra. Let it dry (again - mostly). Use a pin to prick the surface of the
decal (round headed sewing pin). Reapply Solvaset and wick. Let it dry.
And "done". Let it dry - FULLY. Use pure - distilled - water to clean up any
residue from the Solvaset. Really DONE. Yes, I use the same process for
all decal brands.
Your methods may vary. Mine work for me.