Can you thicken acrylic paint with flour or sand?

Yes, you can thicken acrylic paint with flour or sand, but it's not the most recommended method. Flour can create a pasty texture and may spoil over time, while sand can add a gritty texture that may not blend well. For better results, consider using commercial acrylic mediums designed specifically for thickening paint, as they maintain the paint's properties and enhance its adhesion and finish.