Based on the black-finished version of the Tomenosuke Blaster PRO Police Model famous for improving with every touch, the parts can be finished in the following way.
Steyr reciever & bolt hundle: black oxide finish then mat black baking paint finish.
Bolt (which can peep out from ejection port of reciever) : satin silver baking paint finish.
Blaster grip flame & LR cylinder cover & laser sight: gloss black baking paint finish.
The bottom face of grip end: mat black baking paint finish.
Trigger guard: black oxide finish then mat black baking paint finish.
Die cast parts (trigger, biding post, Steyr safety, cylinder latch & etc.): blast black finish (=blast polish processing then black oxide finish).
Charter Arms frame & barrel: skin color of black heavy weight plastic.
Steyr magazine housing & magazine: skin color of black ABS plastic.