Originally Posted by
SoSmellyAir
In some other states it could be but certainly not in California.
To the best of my knowledge, you can't even buy VM&P Naphtha here. You can still buy Ronsonol, which is Naphtha and it's what I use on the bench for those last minute cleaning tasks, but of course it's in a small bottle that doesn't hold enough to do a chain. But mineral spirits can still be had at the local Home Depot.
"Paint Thinner" could be lots of things, since it describes a use, rather than a composition, so I stick with the mineral spirits.