I DO NOT USE THE GENESIS PAINT THINNER ABOVE ANYMORE.
Even though it is listed as odorless, it still is dangerous to those with sensitive lungs. There is a skull right on the bottle. This fluid, when heated, caused me to have trouble breathing everytime (I have asthma).
So now I use a clear NON-TOXIC Silicone Fluid called A-244 for both painting silicone dolls AND vinyl reborns (below)
you can buy it here by clicking photo of it.
It is sold at Factor2
This stuff above is a thin fluid that does not evaporate as quickly as the Mineral spirits; but it thins out the Genesis paint perfectly. I actually painted a boo boo leg, heatgunned, and then TRIED to rub the paint off and it was permantaly affixed into the vinyl. Once heated, it completely evaporated.
I know this stuff is meant to thin out silicone paint and be affixed to silicone....so I don't know the long term affects of using it with vinyl. But it seems to work perfectly. I ahve used it on all my reborn kits pon my website. And I have no other option because of my asthma.