Swapping is a great suggestion. That'll save you a ton of time if you can find someone. Or just buy a silver grille from a junkyard. Doing a proper paint job will be 6-10 hours of work. I painted the chrome grille on my BMW last year and it has been holding up well, but it did require a lot of work. Prep the plasti-chrome to remove all the gloss, prime it, lay down the colour, clear it with a 2-3 coats of clear, and then let it sit off the vehicle for at least 2 days to harden up. Adding up all the drying time and such it actually took a lot longer than I expected, but the result was very good. Getting all the supplies will certainly cost as much or more than a silver grille from the junkyard.