Stock Rims: Powder Coating and Composition?

[VxSport]

I have two set of oem wheels that I have had powder coated.

The first set I did was oem 16's from a rodeo.
The other set I did was the oem 18's from a '02 Rodeo ( Isuzu offered the left over vx 18's as an option in '02)

You can look at my pics and see the wheels. I did these about 6 to 8 years ago. 50k on them and they still look great, no problems at all.
the plastic center caps I had to spray with rattle can bed liner product to match.

[vp277]

I have two set of oem wheels that I have had powder coated.

The first set I did was oem 16's from a rodeo.
The other set I did was the oem 18's from a '02 Rodeo ( Isuzu offered the left over vx 18's as an option in '02)

Were the 18's originally chromed and if yes did the shop that done the work have any problems stripping the chrome? Thanks.