I'm currently using it on my Millenium Silver Lexus GS430. My wife was kind enough to take our daughter on a two-week trip to Europe, so I've had the pleasure of being able to leave the car in the garage and simply apply coat after coat of SG.
Here's what I've found. I apply the coat at about 10pm each night. The garage is 70 degrees, and about 50% humidity. I let the SG dry for two hours, then wipe it off. It is coming off EASY, and on a few coats I've applied it pretty thick. Currently, I'm up to 6 coats, and because I'm bored and home alone, I probably won't stop until I get to 10. For the six coats, I doubt I've used 3 ounces of product. One trick that was recommended to me by a long-time SG user is to apply it by hand with a yellow foam disc, and when you are done, immediately put the disc into a ziploc baggie. After about three coats, the disc is pretty saturated, so I am using less and less out of the bottle. I've never experienced the removal issues that some have had with SG, and often let it dry this way for a few hours before removing.
I haven't decided whether to top SG with anything, or even use a glaze for a few layers. Like Accumulator, I have used SG on a few different colors, and sometimes I don't like what I see. This is the first time on Lexus Silver, and as soon as my wife returns with my digital camera, I'll post some pics.
All in all, I am still a fan of SG.