Customer came by my shop other day with what looked like new aluminum sled trailer, and when you touched the aluminum felt like it was sealed. Well wasn't a new trailer said he used a product called white diamond, started with polish and the finest scotch brite pad he could find then just polish and a rag. looked really nice and as I said felt like it had a sealer on it. I looked the product up and says it has a long lasting sealant, does anyone have any recommendations? my 17 ElTigre has painted tunnel but have been wanting to clean the tunnel on my wifes 09 F8, preferably a polish and not a acid based cleaner. Not afraid of a little elbow grease but something that works and cleans very well as there are so many out there.