@cheng: the use of a rubber can make dreams come true (it is a cook, don't know from which set).
thanks Ralf! I must remember "Ralf and his Rubber" before I ask such questions next time
...you have done that many times
and I still say much as your idea is another candidate for playmo-customs-invention-nobel prize, I still cant bring myself to do it because buying playmo is challenging & expensive from where I live
...but I'll take a long look at all my chinese/japanese customs and see if Rub-it-like-Ralf would make some new possibilities
thanks for showing me this cook...I would never have guessed