I have noticed some engines can get looking freaking brand new after a good cleaning, even high mileage car engines. I also noticed that the silver metal (aluminum) parts can look like ass after being cleaned. I don't use dress on my engine, but it doesn't look clean like others do. It's like the head, starter, transmission case, and other silver parts look chalky and whiteish or greenish. It looks like they have hard water lime spotting and you want to just wire brush the hell out of them! What's up? Should I dress the engine and hope that covers the discolored chalky looking silver? I hope someone knows what I mean about this silver discoloration; kinda looks like it has been sitting outside and gotten oxidized or something. And this is after detail. Thanks.