Zaino on Silver:
Zaino on Black:
I haven't used Zymol, but I have used Meguiars. It isn't bad, but I feel it isn't as nice as Zaino. A few advantages to Zaino:
1) Durability - I live in AZ, and the sun hasn't affected my Zaino yet. If your car will not be garaged you have an even better reason to use it.
2) Shine - Zaino looks outstanding. The black 'tour above is mine before I claybarred it. Keep in mind it's 4 years old and wasn't garaged the first 3 years I owned it.
3) Compliments itself - Your car will look better w/ each coat you add on top of another.
4) Sheets, doesn't bead - Another reason I like it. If you get rained on, your water spots will be more noticeable if your polish beads than if it sheets.
5) Highly concentrated - I Zaino'd both of the cars above using the same bottle. The actual polish comes in a 16 oz. bottle and after applying 2 coats to the SVT and 3 to the SE, we've used maybe 3 oz. Any other wax I've used would've been gone by then.
Take it from someone who knows the pain of trying to keep a black car beautiful. Zaino is the ticket to how you want your car to look.