Greetings.
I have used dry pigments to mix my own metallic paints using clear acrylic, either gloss or flat depending on the effect I wanted.
Pearl Ex (
Jacquard Products - Pearl Ex Pigments) has several metallic colors, I think their range of metallics used to be larger. Their silver might be good for chrome.
It is actually inexpensive, as a little bit of pigment goes a long way, and a bottle of pigment will last forever, unlike a sharpie, it will never dry out.
The antique silver makes a decent gun metal and I use their coppers and bronzes on ship models.
I am still using bottles of rust, gunmetal and copper dry pigments I purchased at an art supply store in Stockton over 20 years ago.
Hopefully, there must be a few art supply stores in the Bay Area that have not been forced out by the absurd rents.