I'm pretty sure it doesn't matter how it's done or maintained as the chrome is porous so oxygen will always get to the alloy underneath
I guess if it's well waxed and never ridden it could last longer?
Agreed, it doesn't matter who/how you get alloy or potmetal chromed, it's only temporary, and it will lift. My plater (Preston Plate in Melbourne) will plate alloy, they do a lot of the high end show bike plating here in Oz, but they hate doing it, because they know that it won't last like chromed steel will.
Stainless steel vs chromed steel vs zinc/cad plated steel spokes would be an interesting argument I'd reckon. When I restored a 1935 Triumph for a friend I had the hubs and rims powder coated gloss black, and went to get them rebuilt with new spokes, and the wheel builder talked me out of stainless steel spokes, as he said they were too brittle, so instead he installed zinc coated steel spokes.
I've seen chromed steel spokes, but from memory, chrome plating makes steel brittle, and isn't recommended for any steel structure subject to flexing. I do remember that the chrome plated frame on my BMW R69S I owned in the 1970's looked superb, but was cracking around the swingarm pivot and steering head areas? Mine had been chromed by a previous owner, so I don't know if it was just poor quality plating, or something else? Cheers, Terry.