I had to change out the rubber backing on my disc today. The edges had gotten chewed up so off with the old.
Using 3m adhesive remover helped. I imagine any adhesive remover will work just fine.
A stiff rubber backing will allow a little "give" to press in and get stubborn spots. It also minimizes any abrasive granules telegraphing through the paper if they get stuck behind the sheet - which happens. Mostly it's just easier to use and get a good finish vs. a raw disc to abrasive.
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I used this stuff for the rubber to disc. This stuff is "high strength", what ever that means.
I do NOT use this for the abrasive to rubber. That is 3m Feathering adhesive which is a light tack adhesive.
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spray both sides of the bond and let it tack up a minute or two.
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Put on a new one, cut around the edges and then while running, sand the edge smooth.
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Slap on a new sheet of abrasive and off to the races.
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