Probably from fast and sloppy processing of the print. The acid free paper and super alkaline Utah water was bleaching the prints so I didn't thoroughly wash them. The other messy areas are from rubbing spit on the image to see if it would help acidify the paper.
Svend: I really want to try toning in tea but want to get the straight Cyanotype print down first. Funny you should mention "graphic" as my day job is Graphic Design. Thanks for the kind words.