Hi Fellows: I pulled out a left over roll of Oracover silver a while back, and it smelled funny, but went ahead and started covering a wing on a .25 size A-7 hang up model. Well, it did not want to stick down very well, and in the balsa sheeted areas, I got a lot of bubbles even though the iron was not at the shrinking temp. After fighting the bottom half of a wing, I began using up some silver Monocote, and had no more problems. I am just guessing that there is a time line on the glue chemicals, and yes, this Oracover was really old stuff. If when sniffing an old roll, if there is no pugent smell to it, it may be ok to purchase, and use. I just chucked the rest of my old Oracover roll.

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