how does permanent marker do inside resin?

I've personally never tried it, but if you're going to use permanent marker I'd coat it with a less caustic, but heavy duty coat of lacquer before placing it in the resin (Triple Thick Glaze is what I used). I've done this with paper printed from an inkjet printer and the color didn't fade or smear. Resin is extremely caustic and will make ink bleed or fade. Heck, it even takes the measuring markings which are engraved off of my mixing cups when I mix resin! Send me a message if you need anymore tips! Good luck!