Just wet the brush and work up a lather on the hard cake. Even old, hardened oil paint brushes can be restored to their original snap and luster.
Brush Cleaner and Preserver works on most acrylics and watercolours, too.
It gives off no harmful fumes or odors, and it's safe for use in the home, classroom or studio.
I'd say its quite necessary if you buy those expensive kolinsky brushes, it will allow your brushes to serve you for a VERY long time, but at the same time it will bring back your old ones! Zilvinas (Lithuania) on 16 Sep 2015
I was introduced to this in the US whilst in an art shop. Although sceptical on how much better this could be vs washing detergent, it really does make a huge difference. Removes more paint and conditions brushes really well. Just wish it was available in bigger sizes as I'm now likely to get through tons of this stuff! Jan Lewis (Royston, United Kingdom) on 12 Jan 2015
I am very fussy about my brushes and took good care of them no matter how expensive they were, and never throw them away, just "retire" them in a box. I used today for the first time this product and OMG!!! It works like magic, and after I saw what it does to my current brushes, I went into the retired ones and I just could not believe my eyes when even the old stained ones came back to life ! Amazing thing, will keep on using it ! Ioana Sauleac (London, United Kingdom) on 12 Nov 2014