dag65,
No offence, but have you tried putting the Alclad over white?? I haven't either, but I know that you could do it with the SNJ Metalizers. I used to use their aluminum buffing powder on white and it turned out pretty bright.
Like I said, I don't know for sure if it will work either, but it would be good to know. Unfortunately my bench is still not set-up (likely another month or two away) so I can't really try it...
Murray