I've used PlastiDip on all the chrome badges of my truck 2 years ago. I applied several light layers of black then a couple clear coats. I've seen the clear at any display where PlastiDip is sold. It looks the same but has a clear cap.
I clean the badges like the rest of the truck with a pressure washer, soap and a brush and have had no peeling or problems of any kind. None of them are anywhere near gas, though.
I recommend the clear coat and be careful with the gas nozzle. I've read it's easy to touch up but have not had that experience myself.
I like the pebbled look it gave to the tank the guy did here recently. I've heard the finish described as a "rubbery, satin sheen". That's pretty close to how mine turned out. You don't get a smooth gloss finish.
Let us know how it turns out (with pics).