Has anyone tried buffing or polishing the intake manifold (Mine is the L28E) while it it on the engine? I have been rubbing it with some different grades of sandpaper and steel wool so far, to get to the good metal under the oxidation and a bit of shine. It looks like Spring may be coming early, or I might get the torpedo heater back soon, so I could try polishing soon. I would like to just do the plenum part of it first, and then later, take off the fuel injection s stuff and get the runners too. I figure I would need a kind of a high-powered moto tool with a long flexible extension and a small buffing wheel, right? Then just a lot of black polish and time & effort.