Chrome is harder than paint so whatever you apply over it will likely chip off the first time it meets up with an airborne projectile.
A local chrome shop should be able to reverse the chrome process, or you can have it sandblasted, then have it powdercoated.
It's all about how much free time you have and the $$ value you put on your free time, how much time/$$ you want to invest.
I wouldn't assume that the brushguard is stainless steel.
stainless is non ferrous, a magnet wont stick.
stainless is expensive, are you sure its stainless? if he was planning on having it chrome plated, having it made out of stainless is only a hastle/extra cost
You should look into getting it glass blasted.
BTW. what kind of brush guard did you get? Is it an oem mopar guard?
I've been trying to get my hands on one for a while.
This one Urban? I gave mine away years ago.