I am quite interested in ways to reduce the amount of water based paint being flushed down the drain when trade and DIY are cleaning their brushes and rollers. Nobody means any harm, but our water systems are being heavily polluted through lack of education.
There are several very cool developments covered here, how to clean brushes Coincidentally I have been asked to trial a new system for keeping wet paint brushes in good condition overnight ready for carrying on next day. Super simple concept. I will pass on info if it works.