Interesting. Never heard of it, but just checked it out. Interesting stuff, available in many colours. I can’t tell if it’s a foil or mylar. None of the reviews say, but it appears more flexible than I would expect of mylar.
For your chrome stripes, Line O Tape offers their pinstripe tape in chrome. It’s available in widths up to 1/8”, which is .007” (about 3/16” in 1/25 scale ) wider than 3 mm. I have some of the 1/64” chrome tape and just measured its thickness at .0035”, or 3 1/2 thou. It’s a mylar type tape.