Signature quilt in process

Well finally started cutting the material for the signature quilt that I am making for my father's wedding. The quilt is called "Ties that Bind" and it is from Keepsake Signature Quilts by Sally Saulman.

I only have 8 more blocks to go. Need to have it done by July 27th. I think I can have it done. Anyone recommend pens to use for the signing?