In the early 70s, I worked at a chrome shop. I know back then, we had one tank of chemicals, that would strip chrome off of Aluminium (forget the chemical name). So, what I'm getting at is: contact your local chrome shop and ask if this service is currently available. If so, shouldn't be very much money. You of course would still need to remove your rocker boxes, and then polish them out, when you get them back, or you could let the chrome shop polish them out for additional bucks. Just a suggestion, best of luck. JJ