You should try coating unsubbed polyester with a very thin (diluted) coating of Shellac. The solvent is Ethanol. I'm not sure how well it will coat on raw polyester, but it is worth a try. I do know that it works as a subbing layer, will adhere to polyester well, doesn't pickup any dye, and will hold gelatin quite strongly. You could probably get a print coating machine (used in photolabs) to coat sheets of polyester. I think these machines are used with solvent based coating materials. This would be used as a subbing layer, specifically for Matrix film use.
Originally Posted by holmburgers
Regards - Jim Browning