Thinning acrylic paints with water isn't the best option. There are at least 6 ways how to thin acrylic paint, the most effective is
3 Ways to Blend Acrylic Paint - wikiHow
Colour Mixing: Explorations in Blue
How to Properly Clean Your Face Paint Brushes
How To Hydro Dip With Acrylic Paint in 4 Steps? Dos & Donts
How To Fix Cracked Acrylic Painting in 3 Easy Ways
18 Gouache Painting Techniques You Should Try To Paint Like Pro
3 Ways to Make Homemade Paint Thinner - wikiHow
Easy Acrylic Painting Ideas: for Beginners - Fine Art Tutorials
Acrylic Painting Tutorial Thinning Paint and Adding Details
Is Acrylic Paint Washable? Will It Come Off Fabric, Skin, Wood? Is acrylic paint washable, Acrylic paint on fabric, Acrylic painting
How To Make Australian Floetrol, Water – Paint thinned slightly with water only can help create small cell activity.
How To Fix Cracked Acrylic Painting in 3 Easy Ways
How to Make Acrylic Paint: 10 Steps (with Pictures) - wikiHow