Hi Adam
Heres a link to all you need to know about polycarbonate site
https://www.creativemechanisms.com/b...lycarbonate-pc

HDPE melts and becomes pliable at a much lower temperature than polycarbonate
I held my heat gun on some 6mm polycarb( 10cm x 70 cm)and it was still reluctant to bend.
Larger pieces -have them done at the manufacturer.