Found this online. It says light argent silver grille paint. Can anyone confirm this is in fact the light silver like the grille I have and the passenger bezel. Or does it just say light argent and it is really the same argent the darker color found on the nos bezel?
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Mopar has two shades of what they call "argent", light and dark, and many other shades of silver. Now of course just because it says "light" on the can, doesnt mean its going to match bang on, but it should not be the darker color. You may get lucky and find a manufacturer whos light argent matches your grill bang on, they are not all created equal, and as a former painter, I would do what
@Bennoel 10 said, get enough light argent thats to your liking, and paint the entire grill, that way it all matches, if you dont feel comfortable with all the masking and spraying, get a pro to help you out. Or, just keep buying different brands of light argent until you find a bang on match, but that could get pricey!
Silver is a tough color to match, especially a butt match like you are trying to do, even your pic in #9 isnt a bang on match like you say it is, unless the color is different in person. Your bezel in pics one and two even appear to be different shades, the driver side appears to be light argent, and the passenger side appears to be darker, I actually can see four different shades of silver, but it could just be the lighting

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Ive heard good things about this company, you may want to check with them and get their opinion
MOPAR Textured Light Argent Silver