SG!!!!!!! SG will last for 6 months. SG is engineered for use with AIO and it gives longevity. Especially mirror like shine and flatness. Make it great for adding a 100% pure carniba wax. It's by far the most important thing you can put on your car (AIO&SG). It makes dark color, metalic paints look like a mirror and feel like cashmire. A must! I know carnuba will vaporate in 130oF metal temp or 80o in direct sunlight. I know P21S will last I believe to 180oF metal temp. SG is great because it attaches to your paint and carnubas do not. So when the carnuba melts and dirt starts getting on the car the SG is there to protect it. Check link below on a great Thread by TOGWT about shine and long lasting shine.
Something you must do when you apply it is let it sit for 24 hrs so it cures. It will be completely dry and then you can buff off. I love using the contours buffing towel, works great. SG is great for multi coats. I have 5 coats on my Audi and I have a customer that has 8 coats.
Agree with GTO78 apply it with a finishing pad. Disagree with Gto SG will last in high heat longer than EX-P. SG has chemicals that makes it sustain to higher temps that other polymers and is protected by patents. I got to Scotsdale Arizona to auctions and to see family. When I get in discussions with them about applications they always say Klasse SG.
I've used it for 4 years and we get nasty winters and humid summers it doesn't faze Klasse. For instance, one time 4 years ago we got 12 inches as soon as the snow melted I went to a car wash and used just the wand with soap and hot water and the salt just rolled off. I couldn't believe it! That's when I new how great it was.