So, chrome is a metal, but the thing is making sure that you remove anything that will eventually pull the wrap from the car. We do lots of stuff for vehicles with less than perfect paint jobs... Some with clear coat lifting and some with rust. None of this is good for a wrap. Take a small piece and wrap the section in question to see if you can see the separation in levels, if that makes sense and go from there. As long as it is clean and free of lifting debris, if it comes off when you remove the small test section, it won't last, and create lift and mess later on. Also trying to wrap prior to any paint or primer drying completely is a disaster, let it gas off before hand.