I made an accidental dscovery about twenty odd years back.
I was rubbing down a repainted sidepanel from my Guzzi 750-S3 with spray painters rubbing compound.
A blob fell off the rag onto a rocker box of the engine which was under the bench.
I leaned down and wiped it off....Instant gleam!
A wonderful discovery. I have used it ever since on any decent alloy.
A lot less elbow-grease than solvol and a fraction of the price too! :wink:
Nige.