Recently came into a heap of Muncie four speed parts, gears, mainshafts, cluster gears, cases, tail housings, side covers, and midplates. Cleaning the gears and everything non aluminum is easy, what do your guys recommend for cleaning the aluminum. Sandblasting is out, does too much damage. Oven cleaner turns aluminum grey. I need something that is going to remove road grime, and in some cases paint. I have tried acetone, MEK, lacquer thinner, Gunk carburator cleaner, and Berrymans carburator cleaner. The Berrymans did so so, the Gunk stuf is absolutely worthless.