Stupidity and a permanent marker
 

I remember hearing about using Glad press and seal to mark lines for machine quilting. Sounded like a good idea.....until I used a permanent marker for my tracing and then sewed over that line. The white thread turned black. I thought when I ripped out the thread it would be ok. Nope. Anyone have any tips for getting the black marker out? The only thing I can think of would be to do my stitching in a dark color.

I had the same thing happen to me, only I used a red marker and now my stitches are pink :( They are still pink after a couple of washes

I would quilt over it with a purple thread.

I think Tartan's idea would work... I had a friend who was a textile artist and she always said that "oops" were opportunities for embellishment :D

I always let the ink dry overnight then add a second layer and never ever use this method with white fabric! Sorry!

How about an applique of a heart on the line only. Mark some same fabric with the pen and try different was to remove and or cover. This will sound stupid. Wet line then mark with a white chalk line and keep dabbing with a dry cloth.keep going.
Or a friend used spray starch and glue and covered. I didn't like end result. Water and dampening may work or stain remover instead of water.

i can only sympathize. i did the same thing. i dont use the press n seal method anymore

I like the idea of stitching with purple thread. The only other idea I have is using a white permanent marker to go over the dark. Maybe that would cover it?

Sorry that you had this experience.