I have sierra glow on for 6 months already, and I must say it does help tremendously when I'm cleaning the car. Stains and dirt won't stick and is easy to clean off.

Of course, for the tar spots near the bottom side of the car doors, I will use those 3M clay bars (bought for only rm20 for one big piece. Use only 1/10 from that big pice for around 5-6 usage). It rubs the tar spots off like a rubber.

I didn't expect much initially when I went for this coating, just the fact that it will protect my white car from oxidisation and easy to clean. Use the clay bar to wipe, trust me, it helps a lot.