Hi D B, In my ` all-poly` days, courtesy of a well-known rip-off replacement outfit, the ` technician`/ service person would begin at the front hairline, and spray a small amount of citrus-based solvent, such as `Remove`, or C-22, taking care to shield the eyes.......just at the area where the poly ` meets` the [real] skin......wait a few moments, then gently /carefully peel / fold back the poly...... lace-release should do the same job for you.....you just need to get a ` start-point`. A sweat-band placed around your head will be helpful to prevent solvent/s running down while you work and will keep you more comfortable. You need to be patient while you work as it`s a slower process than if debonding a lace system where you simply spray / apply your releasing agent and it seeps through the lace .....the skin is more impervious, obviously, so you have to make a ` start` at the front,and then get in under the base. Peel the system off gradually, whilst spraying lace-release or whatever, as you peel....you have to allow it time to ` work` so you can continue peeling backwards. I would imagine the new thin skins have to be treated gently too as they wouldn`t be as robust as the thicker ones.