I see you have info now on where to find it. Alcohol will remove permanent sharpie, old exrox ink, etc from plastic so I am thinking it will work on not so permanent markers as well.

that same plastic (from JoAnn's) works well when doing an applique pattern...draw the entire pattern on it...place ove the block and then pin down each applique piece as you do it. I saw this way of working in one of the app books I have, but don't remember which one right now.....

Charming,
Tried to PM you but you box is full.

I took the class at Gingers just off Foothill Blvd
gingersquiltshoppe.com
(909) 920-3099
1120 Dewey way, Upland, CA

I think you are referring to Press n Seal wrap. I wouldn't use that on a quilt. I have stopped using it in the kitchen because it leaves a sticky residue on the bowls that is very difficult to remove.

I saw in an online class to get a piece of 1/4" plexiglass. I got one and put painters tape around the edges so you knew where to end with your washable marker. I use it all the time when starting a new quilt on the frame. I can lay it between the bars and draw what I want.
I'm sure the vinyl would work too, but not stable like the plexiglass.
Washable markers work too.