There are several threads here and in the detail product forum that address silver cars. It might take some time to find them all but you will have lots of good information. I have a billet silver truck (Honda Ridgeline). First of all, do not expect to get the wow or "pop" factor from a silver like you do a darker color - just can't happen. However, you can come real close.
I like to use the
Klasse twins (AIO/SG) although I do have Jeff's Jett waiting in the wings. I apply AIOx2 and SGx3 twice a year and that is all I need to do.
SG can be applied right after the
AIO but wait at least 12 hours between SG coats to cure. My QD is
Menzerna's HGAS for restoring gloss and protection after a wash and Poorboys
SW for minor clean-up. Most name brand shampoos will work just fine and I'm also a big fan of things like QEW and 4 in 1. I like Meguire's
Endurance or Hot Shine for tires and Protectant 303 for the interior. Get good, quality mf towels (such as Cobra) and a nice sheep mit for washing and you're set to go. One tip for silver cars - keep the black tires and trim as black and bright as you can. That really helps to set off the entire look of the silver vehicle.