Your best bet is to look for vinyl car wraps - they're easy to come by wherever you are in the world and there are thousands of options. I've had poor results with the metallic types - I suspect they require a very smooth surface and 120 grit sanding on mdf doesn't cut it (and hey, if I wanted to spend hours sanding I'd just spray the things) but the satins and textured versions work well. The side tape on this one is car vinyl. The stuff I use is designed for furniture making so it's a bit thicker and I like working with it. It's not that hard to come by - I'm going to be a bit coy about the source because I'm starting to get orders for guitars and fiddles with these specific finishes so would prefer not to see too many other people doing them, but if you really want to use one I've shown on a build thread pm me and I'll pass it on.