Acrylic tips

Here are two things about dried acrylic paint I haven't seen elsewhere:

1) When acrylic paint dries it becomes more transparent than it looks when first put on. Most sources say it dries darker, which is probably true, but it's also more transparent and therefore streakier. The reason is that the binder or glue that holds the pigment together is opaque or semi-opaque when wet (whitish), but it dries clear. This is merely my own observation, not a scientifically proven fact.

2) A brush ruined by acrylic paint drying and hardening in the bristles makes a good stick for stirring cans of paint.