Mellotronists

Finally got my M400 #380 cabinet back from the refinisher, and 
it was worth the wait.  It looks brand new, with a white catalytic 
conversion varnish that appears very smooth and... white.

Question:  What is the original "factory" color of the feet?  Mine 
were black, but as I'm sanding them down to repaint, it appears as 
though there is a layer of white underneath the black.

-Jamie Robertson