Acetone has a strong, objectionable odor, but it is not as toxic as some of the other chemicals we deal with. Methanol (the main ingredient of glow fuel) is worse. So, don't be too concerned about using acetone. Wear gloves because it does an amazing job of removing oils from skin very quickly. And use it somewhere with good ventillation. And when you are done, put the rag / swab /Q-tip outside where it won't stink up your living space.

I have found that acetone will disolve the color from some covereings, so avoid getting it on seams if you can.