If its just acetone with nothing else in it, then yes. Benzodiazepines are soluble in alcohols, like etoh (ethanol), isopropyl (rubbing alcohol), and methanol (alcohol you don't fuck around with unless you know how to handle it lest you risk blindness/death).
The problem is, most "nail polish remover" isn't the required dry, pure acetone that is necessary for what you want to do. If you can find the msds for that particular brand, and it only contains acetone, without much water or other ingredients added go for it. If you don't, you risk ingesting poisionous chemicals that could cause serious health issues. Best to get dry acetone, or another dry alcohol like isopropyl if you want to "extract" benzos from pills.
As far as why you would want to do that i have no idea. The bioavailability is close to 90+% orally/sublingually, and if your thinking of shooting it just stop now. Get Propylene glycol, research how to, and do it the right way. If your going to plug the alcohol/benzo solution, well, thats a shitty idea as well if you like your ass not burning like you stuck the nozzle of a mace sprayer up there and went to town. Smoking benzos aren't as effective as oral/sublingual, and snorting alcohols will burn as much as putting them up your ass.
If your doing it to dose it volumetrically, i can understand. But from your "desperate to get high" statement thats a very low probability.
The best solvents for extracting benzos from pills (which is pointless anyway given their high oral/sublingual bio-availability) is PG (propylene glycol), which you could plug without the pain of alcohol, or etoh (ethanol). PG works good for raw benzo powders, but thats not the case with what you seem to be attempting (extraction from pills)
Just eat your kpins and stop trying to get higher than is physically possible with them. You'll end up wasting them, and/or getting sick trying to do otherwise unless you have the right, pure, food grade/clean solvents.