Making Blank Foils
Just started trying to strip bulk foils with acetone to print over top of them, and wanted to share a few interesting discoveries.
First, and probably not news to anyone else: The old foiling that doesn't curl dissolves in acetone, leaving a white, non-foil card (small sample size: DFC from OG Innistrad).
When it comes to the new foils, your results will vary drastically depending on the card you pick. The ink in some recent sets (Rise of Zendikar, Kaldheim, Strixhaven, Double Masters) comes off very easily. However, the ink in Commander Legends & M20 is very resistant and you will end up ruining the back of the card as well (it ends up quite rough). Once again, this observation is affected by small sample sizes.