I made a mistake and left my natural bristle brush in some mineral
spirits after I had put poly on a board. After 2 days it seemed to have
fat caked in the bristles. And it was stiff. I flushed the spirits,
added some more and softened up the brush, but now its coated with what
looks like fat/grease.

Is this brush done for, or is there a resonable way to clean it?



--
Thank you,



"Then said I, Wisdom [is] better than strength: nevertheless the poor
man's wisdom [is] despised, and his words are not heard." Ecclesiastes 9:16