HAHA I was able to keep up with you on all that and I know that you have mentioned before about useing Zinc Chromate (PRODALCHROME880) for aluminum, but I was under the impresion, from the web page, that the phosphate could be used on steel,zinc and aluminum. I know that Zinc Chromate is better for aluminum but I was trying to keep my chemical colection to a minumum. One chemical for cleaning.