Acetone???????

Nail polish remover is not pure acetone, as such it is not as good of a solvent as straight acetone. I use Testor's liquid cement to thin Squadron putty, which contains MEK, it works fine.

nail polish remover works great for smoothing putty, but so does spit - I use both, depending. There is a CA debonder, I think zap makes it.

I wouldn't use stright acetone on plastic since it will severly damage the plastic. It is highly caustic where most plastics are concerned (pour a little in a plastic cup and see how long it lasts - about 2 seconds)

I would advise purchasing Zap Debonder to debond your CA mistakes.
As the others said, Acetone is way too hot, and will destroy styrene plastic in seconds.

Nail polish removers now days have an oil additive so your nails don't go all bleached and white.
They have very little acetone content, just enough to break down the enamel base of nail polish.

I personally use Tamiya putty, have done for years, and to thin it I use cellulose thinners.
This stuff is also useful for making plastic 'goo', as it dissolves the styrene, and after the thinner evaporates, you have a thin sheet of plastic.

Also useful for filling large gaps if you run out of sheet stock

I left a plastic putty knife in a glass of acetone yesterday for too long. It literally melted the plastic. Got the excess putty off though :P