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Do you know what that would do to plastic? That stuff rippes the paint off a car.
I've used Greased Lightning on Headlights before...didn't damage them one bit. And I use G.L. on my headlights to clean them everyweek...hasn't done any harm yet. And if only take the paint off of a car if you let it soak for more than 5 minutes.
Why would greased lightening polish out 350grit sand marks?
Your best bet is to go get some sand paper in lighter and lighter grits. Then compound out the rest, and then follow up with a polish and then wax them babies.
Carquest sells 3M rubbing compound. Fine cut. Work it good work it good. Get the Fine cut.
There's no maybe to it...it does clean. And I said in an earlier post to not let it sit for a long time...but even if it does, all it will do is dry up and you'll have to rinse it off. Especially if you delude it down some, but I don't.