Mineral spirits ignite at 105 to 145 °F (41 to 63 °C).
The best thing to do with mineral spirits is to buy low quantities and reuse them for decades. They evaporate very slowly. [4] X Research source
Follow the next method to dispose of the paint and kitty litter properly. You can buy containers that can safely store solvents at art supply stores, hardware stores and on the Internet. Not all plastic containers are acceptable for use, because the solvent may wear down and break the plastic over time.
Add more medium to your paint, if you feel you may have added too much solvent. Overly diluted paint may not bind to the canvas. However, using more paint medium will reverse the effect.
You can also try to turn in your oily waste disposal container to a hazardous waste disposal event.
