I've actually done similar. Got some muriatic acid and let the crankshaft sit in it for a few hours and cleaned the aluminum off the crank journal from the connecting rod.
To be fair this was on a 9hp snowblower engine, I wouldn't attempt that on an S54.
Edit: This also likely wouldn't work because I believe the bearings in the S54 are lead not aluminum.
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"Yeah, but your scientists were so preoccupied with whether or not they could, they didn't stop to think if they should."
-Dr. Ian Malcolm, Jurassic Park
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