I’ve started using the Form 2 LT resin trays and wanted to know if the FEP layer is replaceable when it gets foggy?
It is not easily replaceable and does not get foggy. It fails mostly due to damage caused by resin particles or scratches from the wiper.
It also degrades from Rigid resin. It is the only resin we have that degrades the tray, it gets wavy at the bottom after a month or two of storage. A bit frustrating since these are supposed to be the long term trays, but we love the precision of rigid. Might consider storing it in another container when not in use to increase wear time.