Now I have identified it, I would like to know what you all recommend to clean the aluminum so I can polish it up. I have been using 100% lemon juice mixed with cream of tarter to form a paist. Also using a little salt for an abrasive. I am using a scowering sponge to clean it with. It has gotten the parts I have worked on very smooth, but still grey shadows throughout and grey between the raised letters.
Thanks in advanced.