I bought a set similar to these for Ferrari, Lotus, and Lamborghini a few years ago. Not sure if these are the exact ones I bought, but they look the same. They are like a self-adhesive metal transfer. The ones I bought look nice, but the 'metal' is very soft and easy to distort when cuttting from the fret, and the adhesive on the back is quite thick, like craft-store spray adhesives. I tried to remove the adhesive with lacquer thinner, but no luck. Other solvents may work, such as acetone, or maybe Goo-Gone. The scripts themselves look very nice.
chrome(metal) decals Lambao B (Golden) 2153 | eBay
chrome(metal) decals Lambao B (silver) 2153 | eBay