Greg,
I used Glisten PC on most of the aluminum under the hood on my Cobra.
I did the intake, polished valve covers, heads, and many polished aluminum brackets I fabricated.
It is easy to apply, a good brush works just as well as spraying. Brush strokes just melt away as it cures.
It is tough and impervious to
oil and gasoline.
It has held up great. I finished the car in 2000 and in 1700 miles the only place it has discolored is the aluminum heads exhaust port area, just above the header flange. Even there it hasen't peeled, just turned a brownish color.
I highly recommend it.
David