Well, I finally got around to customizing my arcade guns. I went with the ones from arcadeguns.com partially because I like the button setup and assigning reload to button 2, under the trigger on the front of the grip.
The chrome paint is Spaz Stix Ultimate Mirror Chrome,
http://www.spazstix.com/mirror-chromeIt didn't turn out as 'mirror' like as I wanted but after about 4 medium coats of ultra glossy black, I was able to get a pretty good finish. The Spaz Stix route was about $30 after shipping and all (gloss black locally, mirror chrome and acrylic finish coat from thetoyz.com - they offer 10% off first order.)
I believe this would be a much better option but it's a total commitment for the $130.
http://www.alsacorp.com/products/killercans/kc/killerchrome.htmThe masking film is from Hobby Lobby, a low tack hobby film for airbrushing and the like. I use the roll but the sheets are great too.
http://shop.hobbylobby.com/crafts-hobbies-and-fabric-crafts/models-paints-and-accessories/masks-and-templates/I started with about 4 medium coats of gloss black, letting the paint fully dry between coats - I waited 1-2 days between each. The idea is to get the surface as glass smooth as possible. The glassier, the better the reflection. Then do the whole gun chrome paying less attention to the grips. I did 2 thin coats, again letting it dry. The chrome dried much quicker. I made sure they weren't at all tacky to the touch before handling, hanging them by the cords.
Then, I went through the masking process with each grip, painted, dried, carefully removed masking, rock n roll!
Hope you like!