Went to halfords today to buy Zymol Canuba wax polish to do my iceberg silver 172, they didnt have any left...normally I use Auto Glym, but instead I bought Williams F1 canuba wax polish as last resort (probably rebadged Zymol).
Got home, washed the car and polished it 3 times wuth the Williams stuff...the paint work came up like a mirror and its none abrasive.. I think its better than Autoglym as it doesnt leave any white powder and it goes on and polishes off with ease.....but it is probably comparable to Meguires gold and zymol...although Ive never tried them.
Also Did the alloys with the same stuff and they absolutely sparkle now in sunligh..I would recommend trying it..bit pricey at £9.99 but looks the biz. But it actually works...
At the weekend if it is still warm and sunny, going to re-polish to see if the shine gets any better...good preparation for sh*te winter weather to come.