Disposable paper dust masks can be used to filter thinners and light finishing oils. To support the mask as the liquid is poured through it, I put the mask in a funnel. Now that I know what to do with the dust masks besides throwing them away, I change my masks more often and I feel less wasteful about it. The masks work better than paint filters, especially on expensive solvents like lacquer thinner.
Michael R. Sweem, Downey, CA