Spray chrome is a method that chromes parts by deposition, not electrolysis. Its environmentally safe because it doesn't use any harsh chemicals or chromium waste.
The methods is similar to what is used in the glass industry to apply a coating to glass to make mirror.
You can use this to chrome anything, even bondo-filled metal and plastic.
http://www.youtube.com/watch?v=A-1cTpSZ1l8
When I first saw this, I thought it was fake.
UK companies are doing this, and selling home kits.
http://www.youtube.com/watch?v=yvtRYZ5EasA
There is a huge interest in many US states that have made traditional chroming too expensive due to specialized waste management and toxic disposal. This method was developed by a German company, Mercedes has used it for entire show cars.
It's not as strong as true chrome, but it's best considered like paint, so it needs to be urethane coated.