GENERAL'S The Masters Brush Cleaner and Preserver – Non-Toxic – Cleans & Restores Art Paint Brushes – Removes Acrylic, Oil & Watercolor Paint – 2.5 oz

Sorry I misunderstood. Biggest thing is to rinse the brush in your water cup periodically, maybe every couple of paint dips to help reduce the amount of metal flake that stays in the brush. Here are my two recommendations to use when cleaning flake out of the brushes. The brush cleaner has worked well for some of my neglected brushes, and the soap has helped maintain and restore shape on said brushes. Brush cleanerGreen Piece® Paint Brush Cleaner... https://www.amazon.com/dp/B09J8L55SK?ref=ppx_pop_mob_ap_share Brush soapGENERAL'S The Masters Brush... https://www.amazon.com/dp/B0009RRT9Y?ref=ppx_pop_mob_ap_share I hope this helps and is in the correct direction