As is always the case the finish you can acheive all comes down to the prep work , the more time spent on prep work ie washing,claying, polishing/correction the better the end result imo.
As for a good LSP for silver jeff's acyllic kit is really very good gives amazing flake pop and the durability is extremely good.
Thanks to the bigYin for the compliment.
Heres how silver can/should look.
Can get a good finish off of silver, but you won't see a great difference between budget polishes and waxes and the expensive stuff. Depending hwta you use, and the paint on the car, you can get either a really glossy, reflective wet look silver or a flatter, flake-popping finish. Both are nice.
As said, the bonus is that swirls and scratches don't show up too badly.
Destiny is a fairly high end wax and should last well, as Carnauba's go it should hold up about as well as any Carnauba. For the price it costs not one I would use on Silver !