Hello, just found your you wanting information on starch to use. First of all I started quilting back in 1987 and made my first tablecloth. found out much later that it wasn't a beginner project, but at the time I didn't know. I like the board here and all the members too. I found 1 partner in a swap block and that was back in 2011. She & I are emailing each other even 2 yrs. later and have become good friends and my husband & I flew out to meet her and her 2 sweet kids.
So now "starch" I use Spray Faultless Heavy lavender scented.I get it from my grocery store or Walmart and cost 97cents.
I only use on fabrics before cutting out pieces. Nothing else gets the starch. I think the fabrics need it to keep from stretching out of square. Makes cutting so much easier. And it smells great also. I keep it down stairs in my sewing room and upstairs for use there. Now its such a habit that I don't even think about it just grab the can and spray as I go.
Hope this helps you out.
Jigs