Thank you, all!
I just had to use the Fabrico markers "sore thumb trick" to eliminate a discoloration on a fold - apparently, sunlight made it through the curtains and the plastic bins and faded some folded edges on some FQ's.
I'm always cussin' how stuffed my studio is, but when something like this comes up, I'm very happy to have a good stash of art supplies. You can't find the faded line, I don't even know which block it was on, now.
