part of the answer must be that blue tape looking stuff?
enquiring minds want to know...
The blue tape is what Topps "Chrome" sticks to the thick paper.
1) First, carefully peel back layer of paper on top blue tape.....usually with practice, becomes easier - but sometimes from Multiple corners helps.
2) Now plyable, Peel back a corner of the blue.....and work it a bit to get the whole small edge started....place on clean surface and pull straight back rest of tape.
-- Whole set is not much thicker than a deck of cards LOL
3) Attach to sticky back Magnet film (30mil works great!)
4) Trim with cutting board (used Fiskers model) to get perfect corners and straight cuts and detail carefully with xacto knife.
--- Whole process took 3 Robin Williams Movies