Or copy this URL:
https://www.metalroofing.com/spirit/comment/6092/find/
I would strongly urge you to go back to Nu-Ray because they will know what type of paint finish you have and what sort of cleaners would be appropriate.
That said, often, a mixture of equal parts of water, liquid detergent (such as Tide) and TSP (such as Soilax) will be used on such things.
Remember to allow for safety when doing this.
6/20/2005
Isaiah Industries, Inc.
6/20/2005