El paso electroplating is local to me, I can go down there and check out their stuff for you free of charge. I HIGHLY doubt they "ship" their stuff over the boarder to get it chrome plated. Not to mention from their website:
We will contact you upon visual inspection of your items.
All work done in this facility.
No surface preparation is required before shipping items to us.
Disassemble all connected parts.
http://www.electroplatingelpaso.com/english/about-us
1040 Hawkins Blvd, El Paso, TX 79915
Check out the picture of their plating room and then look at the building on google maps. It's all in house.