Hello, I too have had all my engine parts powder coated..
All Sheet metal, Engine cross mounting bar, Pulley housing: Black
11 Blade Fan and upper Valve covers, Strut tower Bar: Red
Fan housing, Air pump bracket, Lower valve covers: Clear
Cost for all my parts Listed plus a few more Misc. pieces and 3 colors $150.00
Oven temp for Powder 350 Deg.F - 400 Deg F for 10 minutes
Magnesium Autoignite Temp, 1200 Deg. F
Optimum Magnesium working temp, 350 Deg F - 500 Deg F.
Cases are 80% Magnesium, 9% Aluminum, .13% Magnese, < 1%
Siver.
Jorge (Targa Dude)