I was told after a good cleaning and polishing to use "RejeX" on them. It's a Soil barrier/ anti stain protection. After applying you have to let it cure out of the elements for 12 hours.
I haven't used it yet, but I bought a bottle to try it out. The recommendation came from a very good source and I trust his opinion. You can read more about it here....
http://www.corrosionx.com/rejexmain.html
I haven't used it yet, but I bought a bottle to try it out. The recommendation came from a very good source and I trust his opinion. You can read more about it here....
http://www.corrosionx.com/rejexmain.html