opinion on intakes?

I find it hard to keep the aluminum clean also. So far, I have been painting all of mine. On the first 318 the stock 4bbl intake is engine color.
On the other 318, it is painted silver. On the 340 I posted video of, it is engine color also.
I do have a used airgap I have not had on an engine yet. Maybe I will buff it and go natural with it.