Now, there's an idea. I'm not crazy about the acetone myself and wondered if there was something else worthy of trying. I think the acetone is the hardest thing on containers too. I've found some plastic bottles work well but then caps suffer - get brittle and crumbly. Many caps are not marked with a recycling number so you can't tell what they're made of.I use the MMO in place of the acetone, as I don't like to use it because of its flammability. Works well, just slower than with acetone.