Many years ago I bought a big tin of Dulux Paint Brush Cleaner and Renovator. Lovely stuff - fairly viscous and non-volatile liquid. You could leave brushes in it for ages then just wash out the paint with water and a drop of washing-up liquid. Would dissolve old paint out of brushes too, if not too dry.
I emptied the tin and went to my local Dulux Centre for more only to find it seems not to exist now - the stuff they sold me is pretty poor by comparison. Google search also comes up with nothing.
Anyone remember this stuff and can recommend an equivalent?