Aero Blue,
Incredibly, I topped off the AIO w/P21S. The car has been through improper washing for months since late August, and I have always wanted to try SG, but I am a bit worried...I hear that SG is very finicky and if you don't apply it to it's exact level of thickness, it's a pain to remove. Do you have some? If so, pm me and tell me more about it b/c you might be able to persuade me to actually get the stuff. The main reason why I haven't gotten the stuff is because of this difficulty in removal, but I would like to have more longevity than the P21S...feel free to recommend anything suitable as a topper of AIO. I will say, after the whole day detailing, it just seems nice to know that your last step product is very easy to apply and remove.

Sorry for the little thread stealing, but all I can say is...put a good sealant and/or even just some wax so that you prevent severe paint contamination in the future!