Thanks all! Maybe I should have used the word “refresh” instead of restore, sorry. Obviously worn out rubber is worn out and would need replacing, that‘s a given and yes I agree nitro glycerin would work best, lol. I was referring to the cushions on an older table, that is being recovered, with the rails still in pretty good shape. My SportKing, from the 1960’s ,that I just acquired, has the Monarch Cushions on it that still have a lot of bounce to them and I don’t want to replace them unless I have too. I’ve read Monarch were some of the best. Anyway a lot to be said for a table that’s around 50 years old. In an early post of mine “Table Help” referring to an older SportKing table someone posted “… I kept the original cushions cleaned them up and put glycerin to help refresh the rubber…” That post is what had me curios. With older rubber such as with the Monarch Cushions would applying Glycerin “Refresh” them in any way or would it just be a waste of time?