I agree with Tartan, although I am not an expert, she is.
Originally Posted by
Tartan
You can FMQ polyester but it moves more than 80/20 . You need to baste well so you don't get wrinkles on the back. Usually I would change it out but I think I would FMQ a heart around the hand quilting to preserve it for the daughter and persevere with FMQing the original batt.