I forgot another important tip when using white. Ensure there are no rogue threads sitting behind as these definitely will be seen through the front of your fabric.
|you can faintly see a rogue thread at the point of my quick unpick.|
|this the rogue thread|
You can carefully pull a thread out from the front of a quilt with a needle. Unfortunately I had to many of these rogue threads so it is much easier to unpick the quilting and start again.
To remove the stitch holes in my backing fabric, I have given it a quick cold water rinse in the washing machine. For the front of the quilt, I will lightly spray water and iron.