Any good methods? I picked up a salvaged CBR600 engine and need to get it cleaned up for a dune buggy project.

Glen

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All I could find
Looks like the easiest route, But I wouldn't play around with it. Looks like bad $***.

 

HF acid based -- that's nasty stuff. I mean isn't HF acid the stuff they have to keep in special plastic because it'll eat through glass? My question is how much elbow grease do you intend to put into this project? If you don't mind a little work Mothers (or other aluminum polish brands) will work wonders on old crappy aluminum. But it's messy and takes a while. Of course if you spill it on you it won't burn a hole in your shoes like acid

 

Option I have used on restoring old BMW blocks and Aluminum Parts is to rent a Sand blaster. DON'T USE SAND!! glass bead blast it or use this stuff that looks like walnut shells ask a shop that rents the equipment.I did a bunch of parts and only cost about $50.
Repsol1

 

i talked to someone who said that mag wheel cleaner will get oxidation off ONLY CAST ALUMINUM, NOT POLISHED. If you put it on polished, it will screw it up. Its an acid that takes a layer, He says it maked cast look brand new, can find it in any automotive store in the cleaning section, like autozone or advanced. brands like eagle one, and so forth.

 

OK Listen up. Take 1 part auotmatic transmission fluid and 2 parts mineral spirits (paint thinner- NOT lacquer thinner). Mix together spray or brush it on. Light coat is fine. Let sit maybe a hour. NEXT use orange citrus cleaner (the kind in the orange spray bottle at the Dollar stores) Spray that over the ATF mix. SCRUB with an old tooth brush, use a popsicle stick in the corners. A "scotchbrite' maroon pad or a potscrubber pad used with LIGHT pressure can work nicely in some places. Rinse with HOT water (you should tape off carbs and open holes BEFORE you start !!!!) Repeat a few times and it will look good When dry- spray it down with the atf/mix and wipe dry with a rag or paper towels----will make it easier to clean next time. This is a good cheap system. I really enjoy working on clean equipment and this makes it easy. YMMV. Usual disclaimers apply.