if you want to be adventurous there are inks for printing PCBs - printed circuit board - you can run it in piezo head printer, the print looks like gold - nothing like the "metallic ink" crap, it's actually colloidal silver but it looks like gold. And it won't fade - ever. The cost is rather high - a liter is about $4K if I'm not mistaken, it's been a while...The technology has been around for some 20+ years - not for graphics, though...You'll have to create a separate channel for it in your rip so you need a printer with more than 4 colors - you just mentioned Roland so I don't know what you have there. The adventure part is just that - don't know what it will do to the printhead in a long run, it worked for me in Epson 7800 for a while - like 4-5 months, then I dropped it, went different route. PM me if you're serious I'll hook you up w inks.