What to clean 2004r case with

[Warrant]

I just went out to clean my 2004r case, used 3000 psi pressure washer, engine degreaser, brake cleaner, and simple grean. got most of the big stuff off, and the inside came pretty clean. But the case is still ugly brown and some black pasty grease is still caked on, not the bright aluminum i was looking for.

I need a super solvent, What could I use? what works for you?

 

[bison]

I use my local machine shops parts washer. They come out totally clean of oil and grease. If you want to remove the oxidation you will need to bead blast the case and then spend more $ having them wash it again.