To get the old corks off, I just peeled them off with a knife which then left the glue to remove.
The glue seems to be like Selleys or Norton Bear contact cement.
I found that by brushing some petrol on the glue, which softened it, I was the able to rub it off with a rag.
Once the glue was off, I used a wire brush to take the gloss off the surface to be re-glued. I also used some wax and grease remover to clean this surface to give the glue the best chance of sticking.
I used Selleys contact cement to glue the corks back on.
It is heat and water resistant.
I just used a small paint brush and applied the the glue to the cork and the clutch plate and allowed it to become touch dry as per the instructions on the can.
Then you very carefully stick the cork to the clutch plate.
You only get one chance at this as the glue is instant stick.
Once the cork is in place, I just used a small block of wood and hammer to gently tapped the cork down. All done and just like new.
