Someone posted some time ago that a good substitute for peel ply that was inexpensive was common sheer material used along with curtains. It would be commonly available at Walmart, Kmart and such.
If weight saving is not the issue, just a smooth finish with least amount of work, I have had great results by using "deck cloth" as the last layer, and apply little if no epoxy, and just wet it out with excess from the layer below. It adds a small amount of strength, and leaves a very smooth surface ready for finish work with next to no pinholes etc... Colin N96TA
