Painting INSIDE of new chrome bumper?

I am getting ready to install new AMD bumpers and was thinking about scuffing and painting the inside (non visible) to keep carrosion at bay. Even considering painting with truck bed coating.

I'd appreciate thoughts about whether this is a good or bad idea.
i do that with my polished wheels i try and match the paint color as close as i can it really looks good stays cleaner longer and most dirt washes off nice