I finally removed and sold my Gobi rack. The PO applied some type of protectant to the hard top and missed 2 areas that were inaccessible due to the rack. I have no idea what he used. The flares are also treated the same. When I bought it I did not notice this and therefore did not ask him what he used. It appears to have been applied with a cloth, darkened the grey to a black and has a gloss finish. The bare areas are very oxidized and I need to treat them and try to keep the same look as the rest of the top. Whatever he used seems to be very durable and not some cheap product. Any Ideas of what he may have used? What do you use on your Hard top to remove oxidation and protect it? I believe this is an after market top.