Cleaning Crankcase

Posted by jimw On 2010/2/6 11:27:50

Does anyone have any suggestions as to how to restore the bright silver aluminum finish to my 1929 Big Eight crankcase. While it is in good condition, it has turned a dark gray after all these years. I have had it cleaned in a high pressure hot cabinet and have had the exterior further cleaned with plastic beads, but the dark color remains. I have experimented with the tappet covers by glass beading them and they come out shiny silver. Don't want to subject my crankcase to glass beads, though.

Jim W.
'29 640 Phaeton