rndelling

I made these hexagon placemats, tube block hot pads and criss cross coasters all from patterns I've found here.

I absolutely fell in love with the tube quilting method and would like to make a twin size quilt but I'm a little worried about doing something that large because of the bias edges. It wasn't a problem with the hot pads as it was just one block with binding but I want to put the blocks together without sashing in between.

Some of you here say to starch so my question is do you use spray starch or liquid. When do you starch? Could I make the tube and then spray starch heavily before cutting the blocks?
I know that someone here will be able to help me.