working with fluon

Hi all! I have spent the better part of today trying to scrub the fluon off of a plastic container. In this particular case, I think the petroleum jelly I applied above the fluon has mixed in with it and is protecting it from my soapy brillo pad. Basically, I am finding the fluon to be very resistant to scrubbing. I've tried soap and oven degreaser.

does anyone have any advice on fluon removal? While I'm on the topic, any pointers for working with fluon in general? I am self-taught and always looking for advice.