Hi mnnb...I placed the rubber between two layers of cloth (tea towel) and put the Iron on max heat and max steam and first ironed the rubbers side for about a minute and then the sponge side for a minute and then alternate at 10 seconds a side until the rubber is very hot...I needed to use rubber gloves to touch the rubber, but the sponge came off very easily with maybe a little residue on a few of the pips...but not lumps or anything like that...I think if i had ironed it for longer I wouldn't have been any residue on any pips.
PS...so I can easily get the rubbers off next time I just spray the rubber with a contact glue spray marketed in Oz as Septone contact spray which is available in most car parts and things shops...and then when the next rubber comes off I just give the sponge a quick wipe with thinners which makes it tacky again, and on goes the next rubber...pips or inverted...that way i can just take a bit of thinners to practice and change rubbers in a few seconds...well...less than a minute..
I had a sheet of Butterfly Super Anti Special, and the sponge from that was the slowest I have seen, and I use that separated sponge from the BSAS as a base for all of my tricky rubbers...and all that is required is for me to place the bat in the road and the ball goes back over the net with whatever reversal I have wanted to put on it... and the sponge tends to make many rubbers do things to the ball that is not a normal shot for that particular rubber.
I've never been able to successfully remove the sponge from Butterfly Super Anti Special without destroying it. How did you do it?