Yes, when I build the Speed champions and want them to look perfect I wear nitrile gloves to avoid any finger prints, if the stickers and/or the element are Trans, like the Supra, I will clean the element first with eye glass cleaning solution because any smudges or fingerprints from handling the element will show through. I use a small bottle of eye glass cleaning solution and spray a fine mist from about 8 inches away on the element that I am applying it to then use the eyeglass no scratch cloth to absorb any excess and use a weighted exacto knife to remove, align, and place the sticker keeping placement with adjoining stickers in mind as you don't always want the sticker centered for the overall build to look its best. I will then use the cloth and the rounded edge of a brick separator to remove any air bubbles.
Trans stickers are not as thick as white/colored back stickers and placing them is more difficult especially on trans elements. I remember before I used the above technique I totally botched the cockpit elements on the original tumbler and most of my bigger builds I would not even apply the stickers too, but those speed champions sets look amazing when done properly.