How To Dispose Of Paint Thinner At Home. After soaking tools or brushes, leave the paint thinner to sit in a sealed glass container. After the paint solidifies, remove what should be a hard disk and put it in the trash.
After you recover the clear paint thinner, you will be left with some colored sludge in the bottom of the container. Allow the liquid to evaporate entirely.
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Allow the old one to dry, and discard. Allow the paint thinner to soak in the solution, then pour it into a separate glass container.