Have you noticed if it's hard to keep its shine, over a long period of time? If not, what methods are you using to protect the polished parts?

i just degrease it with "black magic" engine cleaner. Works well for me but im sure someone else can give a better answer since i dont do engine bays too often.

Mothers Aluminum Polish, elbow grease but looks sweet when you spend a little time on it.

I use Blue Magic polish, it cleans up nicely. Usually spend some really good time on it twice a month.

I use Blue Magic polish, it cleans up nicely. Usually spend some really good time on it twice a month.

What he said ^^^^ And if you can have the part cleared that also helps.