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theHIGHLANDER · 09-16-2013, 08:22 AM

If the stains are mixture of old gas and iron sediment, you can't do better than an overnight soak in metal-prep. Headlight lenses, sediment bowls, tail lamp lenses, all will come out looking NOS. The only caution I offer is to remove them over a well padded area as they can be quite slippery when 1st removed. I had a lovely pair of rare Packard headlight lenses that had some stubborn rust in the bottom and all around the edge. After a night in a shallow tray of metal-prep, You'd have though they were brand new. Even the stubborn dirt and grime that takes a lot of effort to remove, GONE. I clean all of the glass parts this way and have been since the late 80s. You might be amazed at how well it works.

09-16-2013, 08:22 AM	#14
theHIGHLANDER Senior Member Join Date: Sep 2010 Posts: 492	Re: Old gas stains on glass, how to remove. If the stains are mixture of old gas and iron sediment, you can't do better than an overnight soak in metal-prep. Headlight lenses, sediment bowls, tail lamp lenses, all will come out looking NOS. The only caution I offer is to remove them over a well padded area as they can be quite slippery when 1st removed. I had a lovely pair of rare Packard headlight lenses that had some stubborn rust in the bottom and all around the edge. After a night in a shallow tray of metal-prep, You'd have though they were brand new. Even the stubborn dirt and grime that takes a lot of effort to remove, GONE. I clean all of the glass parts this way and have been since the late 80s. You might be amazed at how well it works.