How to remove starch from silicone ("Oogoo")?

*Oogoo* is an easy and cheap way of creating silicone rubber objects from a hand-formable putty. Basically: just mix silicone caulk with starch (I'm using acetate moisture absorbing silicone caulking and corn starch), the silicone in the mixture sets in about 10 minutes. Links (there are also some relevant videos on Youtube on the TKOR channel):


<http://www.instructables.com/id/How-To-Make-Your-Own-Sugru-Substitute/>


<http://www.instructables.com/id/7-Things-To-Fix-Or-Do-With-Oogoo/>


<http://www.instructables.com/id/Oogoo-mixer-on-the-cheap-avoid-messy-hands-/>


I'm assuming that the starch doesn't chemically react with anything in the Oogoo mixture, so I was thinking that it may be interesting to try and remove it from the silicone rubber. I imagine this could create a light-weight, porous silicone rubber.


What method could I use for removing the starch without degrading the silicone?


I was thinking maybe hydrochloric acid could hydrolyse the starch? I think it wouldn't harm the rubber? Assuming that could work, what concentration of acid should I use at what temperature? If I used 33% hydrochloric acid, should I dilute it first, and what would be the temperature for the hydrolysis of starch?


