Your best bet is to wrap it. Other than that rough up the chrome and an adhesion promoter.

 

I don't recommend doing it, after I did my grill, but I used a torch to bubble the chrome and then flake off after that. I say that because I got a few spots to hot and melted the plastic behind it. I took my time with it but it still melted in a few spots, not bad a little body work and it was fine. Also it took Forevvvvvvver to flake the remaining chrome off. Just a suggestion..

 

why not just dip everything thats what i did looks great and been on there a year now tho the snow and summer here in colorado.

 

Like others have said adhesive promoter I started mine this way then etching prime I scuffed mine with 80 grit for a long time it had some deep scratches but wanted something for it to stick to the I did 4 coats of etching primer then sanded that to 400grit then I used filler primer another 4 coats then again with 400 grit then I layed 3 coats of base sanded that then I did 6 coats of clear to allow my self a lot of sanding buffing and polish

 

This is a shot of it on the truck i still need to get the mesh insert but wanted to see it on the color up close looks a little dofferent until i wipe off clean the rest of the truck but they are the same

 

I'm wondering how good chip guard would work. Transtar makes it in an aerosol.