Getting quilting fabric to stay flat and straight while you're making a fabric art project is almost impossible unless you use spray starch for ironing.
To Starch or Not to Starch - The Sewing Loft
DIY Quilter's Spray Starch Recipe – the geeky bobbin
Shattered Star Quilt Along – Week 2: Part 1 – How to press your fabric – Shannon Fraser Designs
How to Choose the Best Spray Starch for Your Fabric Projects – Dream Fine
Homemade Fabric Starch for Quilting – The Little Mushroom Cap: A Quilting Blog
Starching your fabric before cutting —Sugar Stitches Quilt Co
The Ultimate Guide to Starching Quilt Fabrics - The Seasoned Homemaker®
Niagara Spray Starch 22 Oz 6 Pack Trigger Pump Liquid Starch for Ironing Spray
Starch and Starch Alternatives: which for what? – Teresa Coates
This DIY Spray Starch Costs Pennies And Works Great
Homemade Spray Starch - Patchwork Posse
Fabric Starch - Patchwork Posse