Hop on over to you local craft shop, in my case Michaels, and grab a 4oz. bottle of Windsor and Newton Brush Cleaner & Restorer. It costs around $5 and a little goes a loooong way.It's non-toxic, biodegradable, low(almost non existent)vapor, water soluble, and non abrasive.It eats into and breaks up every paint I have had to throw at it. I keep about an inch or two of it in an old spice bottle, the tall ones with the shaker cap with 2 different size holes on each side. Pop the cap drop in your brush suspended as to not let the bristles touch the bottom, I use rubber wire grommets or a piece of masking tape, or you will have a permanently bent and useless brush. Every 10 minutes or so check your progress(roll bristle between you finger) to see if the paint is disintegrating rinse, dry, and repeat until clean. Rinse well on your final clean and your brush is restored to like new. Provided that it was like that when the paint dried. So far in 3 years I haven't been back to the bottle for more yet!
P.S. Don't leave you brushes in for tooooo long i.e. over 3-4 hours or you will find that the ambient fumes in the bottle have started to soften the paint on your brush handles, lol
Rob
