I just wanted to share some info on materials that could be use for custom: magazine backing boards or comic backing boards. https://www.mycomicshop.com/comicsupplies?dep=125020. Embossing foil To add chrome finish to your custom. stapeecraft, have good tutorial on embossing. They also carry holographic sheets. I also look up a video on how to make your own custom yugioh holographic cards, give good example on how people did there. If anyone knows a good place to by holographic sheets, and are willing to share. thanks