I'm making my first barn quilt (actually two of them...one for outside and one for inside). I am using the color samples for interior/exterior and don't plan on sealing over quilt. However, I am going to do a sealer coat on the back side of the barn quilt for outside for moisture protection. I'm worried about sealer causing the "white" to turn yellow or I Would probably seal front too. Not taking any chances and many say no problems if you use exterior paint.