I grabbed that photo a while back from someone on Jspot who decided to use acetone or acetone nail polish remover on their 1/6 Obitsu, and documented the results.
All that blue stuff flaking off? Layers of vinyl and ABS plastic separating from the rest of the body. Kept doing so, too.
Insofar as using acetone on resin, the results are mixed.
It WILL temporarily soften the resin. Depending on the resin, and even the batch, when it evaporates you may have no problems, the surface becoming powder, the surface becoming pitted, or the surface melting.
Acetone is also very bad for you if you breathe it in.